bluuebunny/crossref_metadata_2025_split huggingface dataset:
IV.—Note on New Minerals from West Phœnix Mine, and from St. Agnes
Authors: Collins J. H. 
Published: December 2006

The Mineral from West Phoenix occurs in globular masses of a Turquoise blue or bluish green color upon Limonite. The interior of each spherule is composed of Limonite within which is sometimes a minute quartz crystal; the exterior surface usually shews indistinct crystalline facets. Fragments examined with a hand-lens shew a conchoidal fracture, but a thin section exhibits faint indications of radiated and concentric structure.The first specimen which came under my notice was given to me by Mr. Simmonds of Liskeard, in October 1875 as a variety of Chalcosiderite or Andrewsite. These minerals had recently been described by Professor N. S. Maskelyne and Dr. Flight, and as there is occasionally a certain resemblance between them and the new mineral, and they all occur together, it was supposed to be the same as one of them. As the specimen was small I placed it in my cabinet, being unwilling to destroy it by making an analysis.
VII.—Description of a new form of Blowpipe Lamp, especially suitable for travellers
Authors: Le Neve Foster C. 
Published: December 2006

This Lamp is shewn half size in figs. 1 to 4. Fig. 1 is a section of the whole lamp ; fig. 2 a view from above ; fig. 3 shews the mode of folding the wick ; and fig. 4 the tinplate cover, which serves as a stand while the lamp is in use.It is provided with a “bayonet” slot, which works over the little pin shewn in fig. 1, so as to keep the cover in place when it is put on over the lamp.The body of the lamp is made from a piece of iron or lead gas pipe, 1 1/2in. internal diameter, to one side of which the wick holder is soldered. I find that “night light” grease suits admirably—ordinary composite candies do very well.
VII.—Note on Certain Black Quartz Crystals from Boscaswell Downs, Cornwall
Authors: Collins J. H. 
Published: December 2006

In the autumn of 1871 I found in a large cavity or “vugh” in the schorlaceous granite of Boscaswell Downs, in the parish of St. Just, Cornwall, a number of black and opaque hexagonal prisms, having ragged terminations, which I at first took to be pseudomorpbs of black tourmaline (schorl), after quartz. They were set aside for further examination and forgotten until the beginning of the present year, when I undertook their examination.I found that, although they were very compact, the sp. gr. was only 2.747, which at once negatived the idea of schorl, the sp. gr. of which ranges from 3.0 to 3.3. I then cut a number of sections for microscopic examination, and these at once shewed that the prisms were composed of clear and eolourless quartz, containing an immense number of tourmaline crystals, mostly very thin and arranged in feathery groups as in Plate III, figs. 1 to 4.
X.—Note on a peculiar form of Quarts Crystals from Australia
Authors: Mello J. M. 
Published: December 2006

This quartz, the precise locality of which is unknown, is different to any that I remember having previously seen. It is apparently from a mineral vein, and consists of an assemblage of quartz pyramids, which differ from the usual form in having each angle apparently supplemented by a small prism, giving to the centre block a curious stellate appearance, fig. 8, Pl. V.The interspaces arc filled up with minute pyramidal crystals of quartz, as well as others of chalybite and pyrites.The fractured under surface fig. 7 shows an infinity of concentric lines of growth, the interior being composed of transparent quartz, while the outer layers are milky and opaque.
V.—Notes on some Norwegian Minerals
Authors: Readwin T. A. 
Published: December 2006

The Silver-mines, near Kongsberg, in Norway, are said to have been worked unceasingly for the last 200 years or more.On June 6th, last, I was fortunate in being allowed to visit these celebrated mines, and also the silver-works at Kongsberg. More fortunate still, in obtaining the present beautiful specimens of native silver and Argentitc. They had very recently been taken from the mines, and I was told that my visit was opportune, because such specimens were not of every day occurrence. Be this, as it may, they are of especial interest just now, as illustrating the theory of “metal-growth,” and the more particularly so, as two of them have most obligingly, since they came into my possession, thrown out sundry hints of bodily activity. In fact, have “grown”; and, as they have a direct bearing upon a previous paper, I propose to describe them as well as I can.
X.—Memoir on Crystallogenesis
Authors: von Hauer Karl Ritter 
Published: December 2006

AbstractA tendency to assume crystalline forms is a property of all crystalloids ; its full or imperfect development depends on external circumstances.Crystals produced in laboratories are generally inferior to natural crystals of the same substances, prohaby because of their too rapid formation. The faculty of crystallization is modified by specific dispositions inherent to the substances. There are many distinct types of crystallization, connected with each other by intermediate types, and even with a transition from amorphous to crystallizable substances.The degree of distinctness of crystals constitutes a fundamental difference. The crystals of many substances are distinct, while below a certain limit of size ; but when this is exceeded, the surfaces are interrupted by re-entering angles, or by irregular drusy cavities or excrescences constantly re-appearing when cleft away, so as, at last, to completely destroy their individuality and regularity.
XI.—Contributions to the Mineralogy of Nova Scotia
Authors: How Henry 
Published: December 2006

In 1861, I described (Edinburgh New Philosophical Journal, and American Journal of Science) a borate, found with glauber salt in gypsum at this place, as a new mineral, by the name of Cryptomorphite, on account of its amorphous appearance to the naked eye being resolved into one most distinctly crystalline, under the microscope.The first criticism on the mineral was made by Prof. Geo. J. Brush (Tenth supplement to Dana's Mineralogy), who said, in effect, that it could not be accepted and named as a new and distinct hydrated borate of soda and lime, because there were already too many names in use for minerals, not clearly made out to be distinct, having more or less closely similar composition.
XV. The Geognosy and Mineralogy of Scotland
Authors: Heddle  
Published: December 2006

Anyone who contemplates on a map the great size of this island in geographic extension, and its extraordinarily irregular outline, would conclude that it must be composed of various formations, and that the connections and dispositions of these must be intricate in the extreme.The latter conclusion will, however, upon a more careful observation, be found to apply only to the western portion of the island. However deeply trenched by the sea iu its lower grounds, however persistently thrusting its cliffs oceanward in its higher, the ridged and furrowed outlines of the eastern, disposed in almost rectilinear sequence, indicate but one formation,—various as the members of that formation may in mere lithological features appear.
XVIII. Notes on some Silicates of Copper, with remarks on the Chrysocolla Group
Authors: Semmons W. 
Published: December 2006

The vast commerce of Liverpool enables those resident in it to observe some very interesting mineralogical facts, though its position among the gently undulating hills of the New Red Sandstone deprives them of the opportunity of collecting indigenous minerals.Having in the course of the past few years specially studied some of the chrysocolla ores imported there, I have been very much struck with the vast differences to be detected in most of their physical characters. These differences in fact are of such importance, as will be seen in the sequel, that I have thought it advisable to mention them to some of our ablest English mineralogists and at their request I have been tempted to insert a record of them in the pages of the Mineralogical Magazine.
III. The County Geognosy and Mineralogy of Scotland
Authors: Heddle  
Published: December 2006

The chapters of this work purport to be chronicles of the present state of our knowledge of the mineralogy of the northern portion of the kingdom. The geognosy and lithology are treated of to such an extent only as, in the first place, to explain the position of the minerals ; and, in the second, to aid future investigators in their explorations.In these chapters, in order to do full justice to the work of others, the authority for, and the original discoverer of every locality mentioned, will be quoted, wherever known.The author, having attempted to visit every known mineral locality to the north of the Forth and Clyde, and having succeeded in this attempt with less than half-a-dozen exceptions, is able in most cases to authenticate, or the opposite, as the case may be, the statements of previous observers.
V. On Cotterite, a new variety of Quartz
Authors: Harkness  
Published: December 2006

Rather more than twelve months ago Sir D. Jephson Norreys, Bart., of Mallow Castle, county Cork, directed my attention to a beautiful mineral which had been obtained by a friend and neighbour of his, Miss Cotter, of Rockforest. Through his kindness I was enabled to see the circumstances under which the mineral occurred ; and also to obtain from Rockforest some fine specimens thereof.The mineral itself is specially characterised by the peculiarity of its lustre, which it possesses in a high degree, producing an aspect of a very unique character. Concerning the kind of lustre, this is somewhat difficult to define.
IX. Preliminary Note on Penwithite, a New Cornish Mineral
Authors: Collins J. H. 
Published: December 2006

This is a highly vitreous transparent reddish brown mineral, which occurs with quartz and rhodocrosite. Its H. is 3.5, and sp. gr. only 2.49.When heated in a tube closed at one end it gives off water, but is otherwise unchanged. More strongly heated in platinum forceps it loses colour and very slightly fuses on the edges.It is brittle, and has a highly conchoidal fracture. When digested with hydrochloric acid, oxide of manganese is dissolved out, and the silica which remains is perfectly colourless.
XXII.–A Brief Description of the Map of Shetland, issued with Vol. II of the Mineralogical Magazine
Authors: Heddle  
Published: December 2006

The accompanying map is the outcome of a survey of Shetland, conducted during part of several summers.Almost the whole of the junctions laid down were visited by myself ; for the few that were not, and also for certain of the lines continued inland—which from an almost unbroken covering of peat and turf, are more or less conjectural—I am indebted to Dr. Hibbert's narrative.To Professor Geikie's map of Scotland I am indebted for the southern limit of the isolated mass of sandstone of the Lerwick district.
VIII. On Haughtonite; a new Mica
Authors: Heddle  
Published: December 2006

Dr. Haughton, by his numerous analyses of the black mica of the Irish granites, may be said to have established the specific individuality of the lepidomelane of Hausmann.That mineral his analyses showed to differ from Biotite in its great excess of ferric oxide and its comparative deficiency of ferrous oxide and magnesia.
IV. Additionl Note on Penwithite
Authors: Collins J. H. 
Published: December 2006

Since my former communication to the Mineralogical Society I have been endeavouring to obtain a sufficient quantity of the pure mineral therein described to complete my analyses. Plenty of what certain dealers have been selling as Penwithite is obtainable from the rubbish heaps at Wheal Owles, but this is mostly dark-brown—nearly or quite opaque, pitch—like in appearance, and of very variable composition-the silica alone varying from 22 up to 57 p. c., and the sp. gr. often being as high as 3.4.The true mineral is sometimes attached to masses of such material—it is highly vitreous and transparent, from dark amber to reddish-brown in colour, H. 3.5 and sp. gr. only 2.49—a remarkable circumstance considering the large amount of manganous oxide present.
XV.–Note on the Minerals of the Island of Cyprus
Authors: Collins J. H. 
Published: December 2006

I have lately had the opportunity of conversing with one of our members, Mr. Jos. Jewell, who has been making an inspection of some parts of the island of Cyprus for mining purposes, and having been called upon by other parties to report on a number of mineral specimens brought from that island, I have thought that a short note on the subject might be of some interest to the members generally.So much has been said of the mineral riches of the island, that I was astonished at the comparative poverty of the specimens brought home, and also at the very small number of mineral species which the island has so far yielded.
XVI.–Notes on some Minerals of the Mawddach Valley
Authors: Readwin T. A. 
Published: December 2006

The late eminent palæontologist, Mr. Salter, F.G.S., characterized the portion of the lovely valley of the Mawddach, at, and near the Falls of the Cain and Mawddach Rivers, "a perfect geological puzzle."Certain it is, that touching Tyddyngwladus, the survey maps are greatly at fault; and, that the rocks, thereabouts, most of them, are of precambrian age.Dr. Hicks, F.G.S., has hit upon the truth, approximately, I think, in what he calls Dimetian at St. David's, (as applied to the lowest beds of this district.)After more than a year's unceasing investigation of these puzzling rocks and their associated minerals (chiefly with reference to the modes of occurrence of the "precious metals").
XX.–Note on Abriachanite
Authors: Heddle  
Published: December 2006

In my preliminary notice of this substance, I stated, upon the authority of Dr. Aitkin, that it had been supposed that it very possibly had at one time been used as a pigment in Inverness; a eolourist there manufacturing a paint the nature of which he kept secret.In re-arranging lately, a number of chemicals which had been made over to me in 1856 by my predecessor, Mr. Connell, I found a bottle with a powder of the same tint, but somewhat darker than the washed Abriachanite. The label of this bottle bore on it "Ultramarine made in 1841, by Murdock Paterson, dyer in Inverness."I have not yet had an opportunity of analysing this powder, which may be merely abriaehanite darkened by simple treatment with an acid.
XXI.–The Geognosy and Mineralogy of Scotland
Authors: Heddle  
Published: December 2006

The localities of geognostic interest in this large island have been referred to in the general description of the islands, and its mineralogy alone now remains to be considered.It has been remarked above, that the muddy silts which, impregnated with the putrescent pitch of fermenting organisms, form the great mass of the flags of the “Old Red,” are exceptionally barren in minerals of interest. The cauce of this is not far to seek :—the components of such silts are not themselves those which go to the formation of many mineral bodies ;—nor have they been subjected to the metamorphic stimulus which excites to a chemical union of ingredients and elements which lie merely in the contact of granular apposition.
I. On some Cornish Tin-stones and Tin-capels
Authors: Collins J. H. 
Published: December 2006

The tin ores (“cassiterite”) for which Cornwall has so long been famous occur under the following conditions:—
1. As pebbles , rolled masses, or grains, in stanniferous gravels and sands (stream-tin.)
The detrital tin-ore of Cornwall may be grouped under the following heads:—
a. The tin pebbles and grains of the most ancient elevated quartz gravels, such as those of “Blue Pool,” in Crowan, referred to by Mr. Tyack, and of St Agnes Beacon, mentioned by Messrs. Kitto and Davies.
b. The pebbles and grains of the “Head” of angular debris—the “over-burden” of the china-clay districts. This is often found at elevations not only considerable in themselves, but relatively, as compared with the surrounding country. It differs as a whole from the quartz gravels just referred to, not only in being much less waterworn, but also in being generally much coarser, some of the fragments being very large. It occurs covering killas as well as granite. Grains of tin-ore are often found widely distributed through the subsoil in the neighbourhood of tin veins, even where there is no “head” properly so-called. This may or may not be of the same age.
IV. On a peculiar pasty form of Silica, from a cavity in Gold-bearing Quartz
Authors: French A. 
Published: December 2006

The alluvium over an area of about 50 square miles around Lead-hills in Lanarkshire, is auriferous. In many places the precious metal may be rendered visible after fifteen or twenty minutes washing with the primitive wooden trough employed by the local gold-seekers. Frequently nuggets have been found weighing from one to four or five pennyweights, and these are often either contained in pieces of loose quartz, or have quartz fragments attached to them; there are therefore good reasons to believe that the gold found in the red stratum of clay lying immediately above the rock has been derived from the numerous quartz veins which traverse the district.
The author was one day searching, along with some friends, for gold quartz in situ, and while examining a vein which crosses a gulch in the hills, called the “Gold Scars,” found cavities in the quartz filled with a peculiar pasty substance, which appeared at first sight like minute scales of silver, which had been precipitated from a solution. Our first impression was that it was silver, but its behaviour in water soon cleared away the delusion; it rendered the water exceedingly turbid and white, and the suspended matter was a long time in settling.
IX. Preliminary Notice of substances which may prove to be New Minerals
Authors: Heddle  
Published: December 2006

I give this name to a substance which may be regarded as of the nature of a hydrated magnesian felspar.It was found by Mr. Dudgeon and myself in granular limestone, about one third of a mile above and north-east of the hamlet of Balvraid; this hamlet is situated six miles up the Glen Beg of Glen Elg, Inverness-shire.Only a single large mass containing the mineral was found. In this mass it was associated with blue necronite (orthoclase of limestones), Biotite, and a hydrated labradorite.Its colour is purplish brown of a pale cast; its structure is crystalline granular, it may be called saccharoid; its hardness is 6; its specific gravity from 2·905 to 2·908
XI. On the Geognosy and Mineralogy of Scotland
Authors: Heddle  
Published: December 2006

Every writer has his moods. It may be thought that the present writer was cynical and severe in his remarks on the geognostic features of Caithness. With a view to remove any such impression, Dr. Maculloch's opinion of that country is quoted ; specially in order that it may be used as a foil to what has to be said concerning the geognosy of Sutherland.Hear then Macculloch. “On entering into Caithness all the pleasures of travelling are gone and past, for an uglier country from one end to the other would not easily be found. In the usual sweeping manner of those who love to generalise, like Humboldt, it is level, or, at least, not hilly, without trees, without enclosures, as black and as flat as Bagshot Heath ; as flat as a pancake ! Nature has provided no monuments, and has refused to be its poet.
XIII. On Substances which may prove to be New Minerals
Authors: Heddle  
Published: December 2006

My notice of this must be considered preliminary in every way. The discovery of “the beautiful carnelian marble of Tyree” has been in a late paper credited to Dr. Walker.For some years after its discovery, it was used, or attempted to be used for mantle-pieces, and other internal decoration.Partly on account of the minuteness of its pattern unfitting it for this purpose, and partly on account of the small quantity sent into the market, it, however, seems never to have found its way into general favour.We find Dr. Macculloch lamenting the wasteful method of working adopted in the quarry,—the wholesale shattering of its mass by the excessive use of “Mines.”
XIV. On Crystallized Olivine from Slag
Authors: Trechmann Charles O. 
Published: December 2006

I have recently measured one of the crystals of the slag described by by Mr. A. E. Arnold, in vol. III, p. 114 of the Magazine. Observed forms :—The angles are therefore almost identical with those derived by Miller (Trans. Phil. Soc., Cambridge, III; Brooke and Miller, Mireralogy, 1852, P. 319) from crystals found in refinery cinder, and the slags of copper furnaces, &c, —having the composition of Fayalite, viz.—2 FeO, SiO2.
Description of the Geological Map of Sutherland
Authors: Heddle  
Published: December 2006

It was with considerable reluctance that I felt myself compelled to discard the system of coloration adopted in the Geological Survey Maps; and rids I did only after the strongly expressed opinion of several geologists.It was not that I have any very intense desire to colour rocks after their natural tints, but I have an aversion to adopting a colour suite which departs markedly therefrom; or one which is in discordance instead of harmony therewith. One friend, a man of great scientific discretion, and himself an artist, writes me that when he looks at a recently published geological Map of Scotland, with its grey Torridon and its red Laurentian, he does not know whether he is standing on his head or his heels.
Analysis of an altered Siderite from Helton Beacon Lead Mine, near Appleby
Authors: Trechmann C. O. 
Published: December 2006

It appeared of interest to determine the nature of the alteration which has changed the light greenish or brownish yellow siderite to the dark, almost perfectly black, glossy crystals so often seen on specimens from this neighbourhood.The material, gathered from the heap of a mine, consisted of massive siderite, crystallised on its natural surfaces in the form of small curved primary rhombohedrons, and associated with quartz, pyrites, blende, and other minerals.
Connellite from Cornwall
Authors: Trechmann C. O. 
Published: December 2006

The crystals are of a similar length, though often considerably thicker than those described by Prof. Maskelyne (Phil. Mag. Jan. 1868), and his general description applies to those under consideration.They are, however, ill-adapted for measurement, as single perfect crystals are rare. As a rule several crystals are longitudinally attached to one another, with slight radial divergence, in such a manner that it becomes difficult or impossible to discriminate between the reflections of their minute faces.
Further Notes on Enargite
Authors: Semmons W. 
Published: December 2006

When I submitted my Paper on Enargite (Min. Mag. Vol. vi. p. 49) to this Society, I was unable to give the exact locality of the mineral. As the territory of Montana embraces a considerable extent of land, I was therefore desirous of ascertaining the position of the mines yielding the ore.Having during the past summer had the opportunity of visiting the locality, I am now able to give some further particulars.
Orthoclase from Kilima-njaro, and Adularia from Switzerland
Authors: Miers H. A. 
Published: December 2006

Professor Bonney has described, in the British Association Report for 1885, the rock specimens brought from Kilima-njaro by Mr. H. Johnston, and has called attention to the peculiar form of the felspar crystals which are porphyritieally developed in a rock referred by him to augite-andesite. It is at his suggestion that a more detailed account of these crystals is here attempted.They are of a brown to yellowish-brown colour, full of cavities, and considerably weathered, and are so much rounded that it is impossible to determine their nature with certainty by means of the hand goniometer. They sometimes attain a length of 85 mm.