# The History of the Royal Society of London/Part 2/Sections 34 to 39

​Besides these, there is another that I shall mention, and that is, the Experiment it self, or the Double-Bottom'd Ship, invented by Sir William Petty: of this I will venture to add a few Words, and I think I may do it without transgressing that Rule I had fix'd to my self, of not enlarging on the praise of particular Names, or Designs. For since the Experiment it self is lost, I hope I may securely speak of its Advantages: seeing Men are wont out of common humanity to allow the commendations of dead Men, I trust I may commend a wreck'd Ship, without any fear of the envy that may thence arise to the Author. In brief therefore I will say this of it, that it was the most considerable Experiment that has been made in this Age of Experiments: if either we regard the great charge of the work, or the wonderful change it was likely to make in Navigation, or the great success, to which this first Attempt was arriv'd. Tho' it was at first confronted with the doubts, and objections of most Seamen of our Nation, yet it soon confuted them by Experience. It appeared very much to excel all other forms of Ships, in sailing, in carriage, in security, and many other such benefits. Its first Voyage it perform'd with admirable swiftness. And tho' it miscarried after its return, yet it was destroy'd by a common fate, and by such a dreadful tempest, as overwhelm'd a great Fleet the same Night: so that the ancient Fabricks of Ships have no reason to triumph over that new Model, when of threescore and ten Sail that were in the same Storm, there was not one escap'd to bring the News.
In a word, though this Invention succeeded not, while it was only supported by private Purses, it will undoubtedly produce great effects, if ever it shall ​be retriev'd upon the publick Stock of a Nation: which will be able to sustain the first hazards and losses that must be allowed to happen in the beginnings of all extraordinary Trials.
§. XXXIV. Their Observations.To their Experiments I will subjoin their Observations, which differ but in name from the other, the same fidelity and truth being regarded in collecting them both.
Observations of the fix'd Stars for the perfecting of Astronomy, by the help of Telescopes: of the Comets in 1665 and 1666, which were made both in London, and elsewhere; and particularly of the first Comet, for above a month after it disappear'd to the naked eye, and became Stationary, and Retrograde.
Observations about Saturn, of the proportion, and position of its Ring, of the motion and orbit of it Lunale, of the shadow of the Ring on the Body, and of the Body on the Ring; and of its Phases, &c. of Jupiter's Belts, and of its spots, and verticity about its Axis, of its eclipsing its Satellites, and being eclips'd by them; of the Orbs, Inclinations, Motions, &c of the Satellites, together with Tables, and Ephemerides of their motions.
Observations of the Spots about the Body of Mars, and of its whirling motion about its Center: of several Eclipses of the Sun and Moon, and some of them as were not taken notice of by Astronomers, of Tables commonly used: of the Spots in the Moon, and of the several appearances in the Phases of it: of the Moon at the same time, by Correspondents in several parts of the World, towards the finding her Parallax, and Distance.
​Observations of the eliptical and waved Figures of the Planetary Bodies, near the Horizon from the Refraction of the Hemisphere: of the effects of Lightning: of the various pressure of the Atmosphere, by a Wheel barometer for several Years, and of its usefulness for predicting the changes of Weather.
Observations on frozen Beer: on the Figures of Snow, frozen Water, Urine congeal'd: on the suspension of Mercury at a great height: on Mines and Minerals: on the Concretions of Wood, Plants, Shells, and several Animals Substances: on the effects of Earthquakes, Fiery Eruptions, and Inundations: on Lakes, Mountains, Damps, subterraneous Fires: on Tides, Currents, and the Depth of the Sea.
Observations of the liming of Ground, for improvement of the Bodies of Sheep, but spoiling their Wool: of several ways for preventing smutty Corn: of the importance of changing Seed-Corn: of the alteration of the Horns of Sheep, and other Cattle, by the change of Pasture: of the Pores and Valves in Wood: the Anatomy of Trees: of the sensitive, and humble Plant.
Observations on the Bills of Mortality: on the Leaves of Sage: on small living Flies in the Powder of Cantharides: of Insects bred in Dew: of Virginian Silk-Bottoms: of the Parts, and Anatomy of Fishes: of the Teeth of Lupus Marinus, that they are the same thing with the Toad-stones set in Rings: of the Respiration of Fishes: of Bernacles: of the calcin'd Powder of Toads: of an outlandish Deer-Skin, and Hair: of the Parts of Vipers: of Stones taken out of the Heart of a Man: of young Vipers: that they do not eat holes through their old ones Bellies, as is commonly affirm'd.
​For Examples of this Head, I will only refer my Reader to those which Mr. Graunt has published on the Bills of Mortality; wherein the Author has shewn, that the meanest and most trivial Matters may be so cultivated, as to bear excellent Fruit, when they come under the Management of an accurate and prudent Observer: For, From those Papers, which went about so many Years, through every Tradesman's Hands, without any manner of Profit, except only to the Clerks that collected them, he has deduc'd many true Conclusions, concerning the gravest and most weighty Parts of Civil Government, and humane Nature.
§. XXXV. An Objection answered concerning the uncertainty of Experiments.As I am now passing away from their Experiments, and Observations, which have been their proper and principal Work; there comes before me an Objection, which is the more to be regarded, because it is rais'd by the Experiments themselves. For it is their common Complaint, that there is a great nicety, and contingency, in the making of many Experiments: that their Success is very often various and inconstant, not only in the Hands of different, but even of the same Triers. From hence they suggest their Fears, that this continuance of Experimenters, of which we talk so much, will not prove so advantageous, though they shall be all equally cautious in observing, and faithful in recording their Discoveries: because it is probable, that the Trials of future Ages will not agree with those of the present, but frequently thwart and contradict them.
The Objection is strong and material; and I am so far from diminishing the weight of it, that I am rather willing to add more to it. I confess many Experiments are obnoxious to failing; either by reason of ​some circumstances, which are scarce discernable, 'till the work be over: or from the diversity of Materials, whereof some may be genuine, some sophisticated, some mix'd, some mix'd some fresh, some may have lost their virtue. And this is chiefly remarkable, in Chymical Operations, wherein if the dissolvents be ill prepar'd, if the Spirts be too much, or too little purify'd, if there be the least alteration, in the degrees of Fire, the quantity of Matter, or by the negligence of those that attend it, the whole course will be overthrown, or chang'd from its first purpose.
But what is now to be concluded from hence? Shall this Instability, and Casualty of Experiments, deter us from labouring in them at all? or should it not rather excite us to be more curious and watchful in their Process? It is to be allow'd, that such undertakings are wonderfully hazardous and difficult; why else does the Royal Society endeavour to preserve them from degenerating, by so many forewarnings, and Rules, and a Method so severe? It is granted, that their event is often uncertain, and not answerable to our expectations. But that only ought to admonish us, of the indispensible necessity of a jealous, and exact Inquiry. If the uncertainty proceeded from a constant irregularity of Nature, we had reason then to despair; but seeing it for the most part arises only from some defect or change in our progress, we should thence learn, first to correct our own miscarriages, before we cease to hope for the success.
Let then the Experiment be often renew'd. If the same kinds and proportions of Ingredients be us'd, and the same circumstances be punctually observ'd, the effect without all question will be the same. If some little variation of any of these, has made any ​tion, a judicious and well practis'd Trier will soon be able to discern the cause of it; and to rectify it, upon the next repetition. If the difference of time, or place, or matter, or Instruments, will not suffer the product to be just the same in all points; yet something else will result, that may prove perhaps as beneficial. If we cannot always arrive at the main end of our Labours, some less unsought Curiosities will arise. If we cannot obtain that which shall be useful for practice, there may something appear that may instruct.
It is stranger that we are not able to inculcate into the minds of many men, the necessity of that distinction of my Lord Bacon's, that there ought to be Experiments of Light, as well as of Fruit. It is their usual word, What solid good will come from thence? They are indeed to be commended for being so severe Exacters of goodness. And it were to be wish'd, that: they would not only exercise this vigour, about Experiments, but on their own lives, and actions: that they would still question with themselves, in all that they do, what solid good will come from thence? But they are to know, that in so large, and so various an Art as this of Experiments, there are many degrees of usefulness: some may serve for real, and plain benefit, without much delight: some for teaching without apparent profit: some for light now, and for use hereafter; some only for ornament, and curiosity. If they will persist in contemning all Experiments, except those which bring with them immediate gain, and a present harvest; they may as well cavil at the Providence of God, that he has not made all the seasons of the year, to be times of mowing, reaping and vintage.
​§. XXXVI. The Instruments they have invented. Of the variety, and excellence of the Instruments, which this Age abounds, for their help in Philosophical matters, I have already discoursed in the former Part. I will now go on to mention those new ones, which they themselves, or some of their Members, have either invented, or advanc'd, for the ease, strength, and direction of their Senses, in the motions of Nature, and Art: of this kind are these that follow.
An Instrument, for finding a Second of Time by the Sun: another for finding the Celestial Refractions.
Three several Quadrants made after three new contrivances, which though they are riot above eighteen Inches in Diameter, and so are manageable in any Window, or Turret, are yet far more exact than the best, that have been hitherto us'd, for Astronomical Observations, or taking Angles at Land.
A new Instrument, for taking Angles by reflection; by which means the Eye at the same time sees the two Objects, both as touching in the same point, though distant almost to a Semicircle: which is of great use for making exact Observations at Sea.
A new kind Back-staff, for taking the Sun's Altitude by the Shadow, and Horizon: which is so contriv'd, that though the Shadow be at three foot distance, or as much more as is desir'd, yet there shall not be the least Penumbra: and the Shadow may be easily distinguish'd to the fourth part of a minute.
A Hoop of all the fix'd Stars in the Zodiac, for the speedy finding the Position of the Ecliptic, and for knowing the Extent of the Constellations.
​A Copernican Sphere, representing the whirling Motion of the Sun, and the Motion of the several Planets.
A great many new ways of making Instruments, for keeping time very exactly, both with Pendulums, and without them; whereby the intervals of time may be measur'd both on the Land, and Sea.
A universal Standard, or measure of Magnitudes, by the help of a Pendulum, never before attempted.
A new kind of Pendulum Clock, wherein the Pendulum moves circularly, going with the most simple, and natural motion, moving very equally, and making no kind of noise.
A Pendulum Clock, shewing the æquation of Time.
Three new ways of Pendulums for Clocks, and several ways of applying the motion of the Watch-work to them.
Several new kinds of Pendulum Watches for the Pocket, wherein the motion is regulated, by Springs, or Weights, or Loadstones, or Flies moving very exactly regular.
Several forts of Instruments for compressing, and rarefying the Air: A Wheel-Barometer, and other Instruments for finding the pressure of the Air, and serving to predict the changes of the Weather.
A new kind of Scales, for examining the gravity of Bodies in all places: to see whether the attraction of the Earth, be not greater in some parts of the Earth, than in others; and whether it do not decrease, at farther distances from the surface of the Earth, either upwards into the Air, or downwards under the Earth.
A very exact pair of Scales, for trying a great number of Magnetical Experiments.
​Several very accurate Beams, for trying many Statical Experiments, and for finding the most exact gravity of several kinds of Bodies.
A great number of Magnetical Instruments, for making Experiments about Loadstones.
Several new kinds of Levels, for finding the true Horizon, where, by one of not above a foot length, the Horizontal line may be found, without the error of many seconds.
A new kind of Augar, for boring the ground, and fetching up whatever it meets with in the right order.
A new Instrument, for fetching up any Substance from the bottom of the Sea, whether Sand, Shells, Clay, Stones, Minerals, Metals.
A new Bucket, for examining and fetching up whatever Water is to be found at the bottom of the Sea, or at any depth, and for bringing it up without mixing with the other Water of the Sea, through which it passes.
Two new ways of sounding the depth of the Sea without a Line, for examining the greatest depth of the Ocean, in those parts of it, that are most remote from the Land.
Several Instruments for finding the velocity of swimming Bodies of several Figures, and mov'd with divers strengths, and for trying what Figures are least apt to be overturn'd, in order to the making a true Theory, of the Forms of Ships, and Boats for all uses.
An Instrument of great height, with Glass windows on the sides, to be fill'd with Water, for examining the velocity of Bodies of several Substances, Figures and Magnitudes, by their descent.
​An Instrument for measuring, and dividing the time of their Descent, to the accurateness of two, or three thirds of time, serving also for examining the swiftness of Bodies descending through the Air, and of Bodies shot by a Gun, or Bow.
A Bell for diving under water to a great depth, wherein a man has continued at a considerable depth under water, for half an hour, without the least inconvenience.
Another Instrument for a Diver, wherein he may continue long under water, and may walk to and fro, and make use of his strength and limbs, almost as freely as in the Air.
A new sort of Spectacles, whereby a Diver may see any thing distinctly under Water.
A new way of conveighing the Air under Water, to any Depth, for the use of Divers.
An Instrument for measuring the swiftness, and strength of the Wind.
An Instrument for raising a continual stream of Water, by turning round a moveable valve, within the hollow of a close Cylindrical Barrel.
Several kinds of Thermometers for discovering the heat, and cold of the Air, or any other Liquors: a Thermometer for examining all the degrees of heat in Flames, and Fires, made of several Substances; as also the degrees of heat requisite to melt Solder, Lead, Tin, Silver, Brass, Iron, Copper, Gold.
A Standard Cold several ways.
An Instrument for planting of Corn.
Four several sorts of Hygroscopes made with several Substances, for discovering the drowth, and moisture of the Air.
​Several kinds of ways to examine the goodness, and badness of Waters.
Several Engines for finding, and determining the force of Gun-powder, by Weights, Springs, Sliding, &c.
An Instrument for receiving, and preserving the force of Gun- Telescopepowder, so as to make it applicable, for the performing of any motion defir'd.
Several Instruments for examining the recoiling, true carriage, and divers other properties of Guns.
Several kinds of Otocousticons, or Instruments, to improve the sense of hearing.
Several Models of Chariots, and other Instruments, for Progressive Motion.
A Cbariot-way-wiser, measuring exactly the length of the way of the Chariot, or Coach, to which it is apply'd.
An Instrument for making Screws with great dispatch.
A way of preserving the most exact impression of a Seal, Medal, Sculpture; and that in a Metal harder than Silver.
An Instrument for grinding Optick-glasses: a double Telescope: several excellent Telescopes of divers lengths of six, twelve, twenty-eight, thirty-six, sixty foot long, with a convenient Apparatus for the managing of them: and several contrivances in them for measuring the Diameters, and parts of the Planets, and for finding the true position, and distancc of the small fix'd Stars, and Satellites.
Towards the exactness of all manner of these Optick-glasses, the English have got a great advantage of late years, by the Art of making Glass, finer, and more serviceable for Microscopes, and Telescopes, than that of Venice. This Invention was brought into our Coun​try, and practis'd here, by the care, and expence of the Duke of Buckingham; whom the Author of these Papers ought to mention with all honour; both for his Skill and Zeal in advancing such Experimental Studies of which I am writing: and also because it has been by the favour of so great a Patron, that I have injoy'd the leisure, and convenience of composing this History.
§XXXVII. Their Repository and Library.As soon as they were reduc'd into a Fix'd Assembly, one of the Principal Intentions they propos'd to accomplish, was a General Collection of all the Effects of Arts, and the Common, or Monstrous Works of Nature. This they at first began by the casual Presents, which either Strangers, or any of their own Members bestow'd upon them. And in short time it has increas'd so fast, by a contribution from all Parts, and chiefly by the bounty of Mr. Colwal, that they have already drawn together into one Room, the greatest part of all the several kinds of things, that are scatter'd throughout the Universe. The Keeping, and Ranging of these into order, is committed to Mr. Hook, who had also the honour of being made the first Curator of the Royal Society by election. This Repository he has begun to reduce under its several heads, according to the exact Method of the Ranks of all the Species of Nature, which has been compos'd by Dr. Wilkins, and will shortly be publish'd in his Universal Language: A Work wherein this excellent Man has undertaken a Design, that very well fits the temper of his own Mind; for it well became him to teach a Communion of Speech amongst all Philosophers; whose chief study it has always been, to promote a general agreement, and ​correspondence amongst all virtuous and wise Men.
This Book had sooner seen the light, if part of it had not perish'd in the Fire. Of its use and accurate composition there is no man can doubt, that has ever heard the name of the Author: of whom, if I had not at first restrain'd my self from particular commendations, I might have said very much in his praise, which deserves to be known to all the World, and to be the first Experiment of his own Universal Language.
Their Library.Having well succeeded in this their purpose of collecting divers patterns of all Natural, and Artificial things; they have also (amongst others) appointed a Committee, whose chief employment shall be to read over whatever Books have been written on such subjects. By this means they hope speedily to observe, and digest into Manuscript volumes, all that has been hitherto try'd, or propounded in such studies. This is the only help that an Experimenter can receive from Books: which he may still use, as his Guides, though not as his Masters. For this end they have begun a Library, consisting only of such Authors, as may be serviceable to their Design. To this there has been lately made a great Addition, by the Munificent Gift of Mr. Henry Howard of Norfolk, who has bestow'd on the Society the whole Arundelian Library, containing several hundreds of choice Manuscripts, besides some thousands of other Books of all kinds. And because many of them belong'd to other Professions, this Noble Benefactor has given them with a free permission of changing them for others, that shall be more proper for their Work: Whereby they will shortly be able to shew a compleat Collection of all that has been ​publish'd in the Ancient, or Modern Tongues, which either regards the productions of Nature, or the effects of all Manual Arts.
Nor is this the only bounty which this Illustrious Person has conferred on the Royal Society; since by the firing of London, the first place of their meeting has been restored to its original use, and made an Exchange, he has afforded them a retreat in his own house, where they assemble at this present: By which favour he has added a new honour to the ancient Nobility of his Race: one of his Ancestors had before adorn'd that place with many of the best Monuments of Antiquity: and now by entertaining these new discoveries under his Roof, his Family deserves the double Praise of having cherish'd both the old, and new Learning; so that now methinks in Arundel-house, there is a perfect representation, what the real Philosophy ought to be: As there we behold new Inventions to flourish amongst the Marbles, and Images of the Dead: so the present Arts, that are now rising, should not aim at the destruction of those that are past, but be content to thrive in their company.
Sect. XXXVIII. Their Discourses and Theories.It will not I hope be expected, that I should present my Reader an Index of all the several Writings, which have at any time been publish'd by the Members of the Royal Society. I shall omit those, which either were printed before the beginning of this Institution, or which treat of matters, that have no relation to their Design. Only I will say in general, that there is scarce any Art, or Argument; which has ever been the subject of humane Wit, of which I might not produce Instances, that some Fellows of this Society have given good proofs of their labours in it: of those Discourses, ​which have been since compos'd by some of their Body, or read before their weekly Assemblies, and directly concern the advancement of their Work, these are the principal.
Several Hypotheses explaining the divers Phases and Motions, and other Phænomena of the Comets.
Several Hypotheses of Saturn, and its Satellites.
An Hypothesis of the cause of the Rugosity of the Moon's surface.
An Hypothesis of the motion of the Moon, and of the Sea depending upon it.
An Hypothesis of the motion of the Planets, and of Circular Motion in general.
Several Hypotheses for the Æquation of Time.
A Discourse about the possibility of the Retardation of Celestial Motions, and of their going slower, and slower, the longer they last.
A Discourse of making the several Vibrations of a Pendulum æqual, by making the weight of it move in a Cycloid instead of a Circle.
Several Discourses, and Hypotheses about the length of a Pendulum, for moving once in a second of Time.
A Discourse of the most convenient length of a Pendulum, for making a Standard for a universal Measure.
Several Astronomical Discourses of Mr. Hortex retriev'd, and digested for the Press.
Uleg Beg translated, about the places of the fix'd Stars, and several other Astronomical Observations.
A Discourse about the possibility of the change of the attractive power of the Earth, and consequently of the variation of the vibrative motion of Pendulums.
A Discourse about short inclining Pendulums, and of other Pendulums counterpois'd above the Center of ​Motion, and of others lying Horizontal in the manner of a Beam.
An Hypothesis about Fire, and Flame.
An Hypothesis, and discourse of the gravity, pressure, and spring of the Air.
A Discourse of an Air Register.
Several Discourses Mathematical, and Philosophical, upon the Experiment of raising great weights by the Breath.
A Discourse and Demonstration against a propos'd Method of doubling the Cube, and of finding two mean Proportionals.
Several Discourses about Thermometers, Hygroscopes, Baroscopes, and other Weather-wisers.
An Hypothesis and Discourse of the Inflection and inflective veins of the Air, and of the fitness, and unfitness of the Air for Cælestial Observations.
An Hypothesis of the Form, and Spring of the Air.
A Discourse of the different parts of the same Water, and of the difference of Waters.
A Discourse and Hypothesis of Filtration, and of the Congruity, and Incongruity of Bodies.
A Discourse of the possible height of the Air, and of its proportionable rarefaction upwards.
An Hypothetical Discourse about the suspension of the Clouds, and their pressure.
An Hypothesis, and Discourse of Earthquakes.
A Discourse of Petrifactions, and an Hypothesis for explaining the several varieties of such Bodies.
Several Discourses about the Loadstone, and an Hypothesis for salving its appearances.
A Discourse about the Pores of Stones.
A Discourse about Eggs.
A Discourse concerning the Glass-drops.
​A Discourse and Hypothesis of annealing, and tempering Steel.
Discourses about Cyder, and Coffee.
A Discourse of the original of Forms.
An Hypothesis of Light.
A Discourse and Hypothesis of the Nature and Proprieties of Colours.
A Discourse about improving Wood for Dying, and for fixing Colours.
A Discourse about the improvement of Musick
A Discourse of the differing Heat of Summer, and Winter.
A Discourse, and Hypothesis about Fluidity.
Discourses upon several Mercurial Experiments.
Discourses of Hydrostaticks.
Discourses about the force of falling Bodies.
A Treatise of the motion of the Muscles.
A Discourse of the Usefulness of Experimental Philosophy.
A Treatise of the vanity of Dogmatizing.
The Sceptical Chymist.
Essays about Salt-peter.
The Parallel of the Ancient, and Modern Architecture.
Microscopical Observations.
Micrographia, or a Discourse of things discover'd by a Microscope.
Three Books of Fevers, of the Brain, and of the Scurvy, which I will alledge as the great Instances of this head: Wherein the famous Author has with accurate Diligence made prodigious improvements in all the parts of Physick, and shewn that the largeness of his Knowledge in it, is equal to the happy success of his practice.
​In this Collection of their Discourses, and Treatises, my Reader beholding so many to pass under the name of Hypotheses, may perhaps imagine that this consists not so well with their Method, and with the main purpose of their Studies, which I have often repeated to be chiefly bent upon the Operative, rather than the Theoretical Philosophy. But I hope he will be satisfied, if he shall remember, that I have already remov'd this doubt, by affirming that whatever Principles, and Speculations they now raise from things, they do not rely upon them as the absolute end, but only use them as a means of farther Knowledge. This way the most speculative Notions, and Theorems that can be drawn from matter, may conduce to much profit. The light of Science, and Doctrines of causes, may serve exceeding well to promote our Experimenting; but they would rather obscure, than illuminate the Mind, if we should only make them the perpetual Objects of our Contemplation: as we see the light of the Sun, is most beneficial to direct our footsteps in walking, and our hands in working, which would certainly make us blind, if we should only continue fix'd, and gazing on its Beams.
§.XXXIX. The Histories they have collected.The Histories they have gather'd, are either of Nature, Arts, or Works. These they have begun to collect by the plainest Method, and from the plainest Information. They have fetch'd their Intelligence from the constant and unerring use of experienc'd Men of the most unaffected, and most unartificial kinds of life. They have already perform'd much in this way, and more they can promise the world to accomplish in a very short space of time.
​There are already brought in to them the History of Comets in general, and especially of the two last: The History of English Mines, and Oars: And particularly two several Histories of Tinneries and Tin-working.
The Histories of Iron-making: of Lignum Fossile: of Saffron: of Alkermes: of Verdigreace: of whiting of Wax: of Cold: of Colours: of Fluidity, and Firmness.
The Histories of Refining: of making Copperas: of making Allum: of Salt-peter: of making Latten: of Lead: of making Salt out of Sea-water: of refining Gold: of making Pot-ashes: of making Ceruse: of making Brass: of Painting, and Limning: of Calcography: of Enamelling: of Varnishing: of Dying.
The Histories of making Cloth: of Worsted-Combers: of Fullers: of Tanners, and Leather-making: of Glovers, and Leather-dressing: of Parchment, and Vellum-making, and the way of making transparent Parchment: of Paper-making: of Hatters: of making Marble Paper: of the Rowling-Press.
The Histories of making Bread: of Malt: of brewing Beer and Ale in several places: of Whale-fishing: of the Weather for several years: Wind-mills, and other Mills in Holland: of Masonry: of Pitch and Tar: of Maiz: of Vintners: of Shot: of making Gun-powder: and of making some that is twenty times as strong as the common Pistol-powder.
The two last of these were communicated to the Royal Society by the favour of Prince Rupert; whom I take the boldness to mention here, for his excellent Knowledge, and use in all manner of Mechanical Operations. But his name will be recorded in all ​the Histories of this Time, for greater works, for many glorious enterprises by Sea and Land, and for the Immortal Benefits whereby he has oblig'd the English Nation.
The Instances that I shall give of this their manner of collecting Histories, shall be, of Works, that of Salt-peter; of Arts, that of Dying; of Nature, that of Oysters: which last may perhaps seem a subject too mean to be particularly alledg'd: but to me it appears worthy to be produc'd. For tho' the British Oysters have been famous in the World, ever since this Island was discover'd, yet the skill how to order them aright, has been so little consider'd amongst our selves, that we see at this day, it is confin'd to some few narrow Creeks of one single County.