bluuebunny/crossref_metadata_2025_split huggingface dataset:
II.―On some Ill-determined Minerals
Authors: Heddle  
Published: December 2006

The following substances have, for the most part, passed under the names here assigned to them; but they are themselves either ill-determined, or doubtful species: in some cases the name has been attached to certainly more than one specifically-distinct substance.From Quiraing in Skye. It occurs in layers of an inch or two in thickness, among the amygdaloids. It is usually of a deep-red colour and has a greasy lustre, but is sometimes earthy and dull.It falls to pieces in water, and may, by this property, and its uniformly dense structure, be distinguished from the red massive mesolite which sometimes occurs along with it.
A Peculiar Copper Ore from Coombing Cogoper Mine, Carcoar, New South Wales
Authors: Liversidge A. 
Published: December 2006

A dark-grey, almost black, copper bearing mineral, somewhat resembling Redruthite in general appearance, but of a duller lustre and considerably harder; the hardness being between 5 and 6. In parts a bronze tint and lustre is apparent. The specimen exhibits neither crystals nor crystalline structure, it breaks with a well marked couchoidal fracture. Lustre somewhat resinous; streak shining.Heated in a glass tube it gives off water, having a strongly marked acid reaction, from the sulphurous acid which is evolved. Before the blowpipe it does not fuse, colours the flame green, and acquires a dull black colour. Treated with strong boiling nitric acid it is rapidly acted upon, a bronze coloured residue being left, the residue when examined under the microscope presents a honey-combed appearance; the walls of the irregular cellular cavities are pale-brown and translucent and apparently composed of quartz; when the powdered mineral is boiled with nitric acid, a white residue of silica is left.
V.―Note on Artificial crystals of “Specular Iron” formed in a Copper Works Slag
Authors: Terrible W. 
Published: December 2006

Since my last communication on Artificial crystals (Min. Mag. No. 19), I have met with some very remarkable crystals formed in a Copper Works Slag which consisted mainly of Cuprous Oxide and Ferric Oxide with a little lime, a product from melting a charge of “copper precipitate.”The crystals are hexagonal plates, bounded on the edges by the faces of a rhombohedron which roughly measured gives an angle of R : R=86° They arc iron black in color, with a splendent metallic lustre, and contain 50% Ferric Oxide with 45% copper.Examined under the microscope or even with a strong lens, particles of copper and cuprous oxide are visible in a separate state.
On some Rocks from the Saas-Grat, compared with Erratic Blocks from the neighbourhood of Lake Leman
Authors: Marshall-Hall J. P. 
Published: December 2006

The following are chiefly notes of a longer paper read April 5th, 1882, before the Société Vaudoise des Sciences Naturelles.For some years familiar with the valleys of Anniviers, St. Nieklaus, Zermatt and Saas, the author has made a study of comparison between the above rocks in situ and erratic specimens of the same nature. The want of a laboratory and of more than a travelling microscope with polarising apparatus render his researches so imperfect that a more complete report upon these rocks must be deferred.
On a Recent Hypothesis with Respect to the Diamond Rock of South Africa
Authors: Hudleston W. H. 
Published: December 2006

This paper forms part of a communication recently made to the Geologists Association, with some additional matter relative to certain criticisms passed upon Mr. Dunn's hypothesis as to the origin of the diamonds.It is taken for granted on this occasion that the leading geological facts are known, I will merely, therefore, draw attention to a generalised section of Kimberley Mine, where one side represents the wall or reef bounding the pipe itself, and is thus constituted:—
The Geognosy and Mineralogy of Scotland
Authors: Heddle  
Published: December 2006

Having, since file date when the few observations chronicled in a previous number were made, ascertained some more definite facts with regard to these marbles, I now note these.The localities in which I had previously observed the marble were all (through faulting and intrusions) so obscure as regards its relationships, that any conclusion as to its horizon was not warranted.
On the Tetartohedral Development of a Crystal of Tourmaline
Authors: Solly R. H. 
Published: December 2006

In working on the isomorphism of Tourmaline I have been struck by the very peculiar development of a fine crystal from Pierrepont, New York, now in the Cambridge Collection.The crystal is doubly terminated, of a jet-black colour and splendid lustre. It weighs 814.88 grammes, and measures 1⅙ inch by 1 inch by ½ inch.
On Diatomaceous Deposits in Scotland
Authors: Ivison Macadam W. 
Published: December 2006

Deposits of Diatoms have been long known to exist in Scotland, but such deposits have so far always been of limited extent. Specimens for the microscope have been readily obtained from certain localities, such as Peterhead, but the occurrence of large deposits covering great tracts of land was unknown.In the year 1881 my attention was directed, by Mr. Hamilton Bell, to a white substance he had obtained from the Peat of Aberdeenshire. During April, 1882, I read a short paper before the Edinburgh Geological Society in which I gave the analysis of a sample received from Mr. Bell, with particulars furnished by the Rev. Geo. Davidson, Minister of Logie Coldstone, Dinner, who also kindly furnished a list of the Diatomaceæ he had identified in the deposit. The list contains some 200 species.
Note on Welsh Gold
Authors: Readwin T. A. 
Published: December 2006

In " Notes on some Minerals of the Mawddach Valley, Merionethshire," Min. Mag, Vol. III. p. 122, I referred to their general auriferous character; and to the occasional occurrence of flee or native Gold in workable quantity, often in states of Electrum, &c.Since then I have been experimenting rather large!y with the auriferous lode-stuff and its enclosing Silurian slate-rock, just at its junction with the coarse Cambrian (or, it may be, pre-Cambrian) sandstone, about 1,000 feet up the Gwynfynydd or white mountain, ascending from the beautiful waterfalls known to tourists as Pistyll-y-Cain and Rhiadr Mawddach.
Note on New Locality for Zoisite
Authors: Hamilton Bell W. 
Published: December 2006

In the Article "Mineralogy,"in the Encyclopædia Britannica, written by Professor Heddle, of St. Andrew's, that gentleman gives the formula of Zoisite :—4 CaO, 3 Al2O3, 6 SiO2+H2O.Alumina 29·8; Lime 24·35; Oxide of Iron 2·8; Silica 40·3; and Water 2·1.) Cleavage, brachy-diagonal, perfect : H=6, G—3·2 to 3·4. White, brownish gray, and dark green. Localities, Glen Urquhart , Dalnein (Grantown), and Alt Gonalan, Inverness-shire ; Sterzing in Tyrol, the San-Alp in Carinthia, the Urals, and Connecticut.
On an Occurrence of Rare Copper Minerals from Utah
Authors: Mackenzie G. S. 
Published: December 2006

In the American Eagle Mine, Utah Territory, occur in intimate association with olivenite and other copper compounds, two copper minerals of an interesting and rare composition.Covering the surface of often large pieces of more or less friable mixed arseniates, sometimes forming a complete green coating, are numbers of beautiful emerald-green globules. In consequence of the firm adherence of the base of the globules to the underlying gangue matter, it was difficult to obtain material pure enough for analysis, and therefore the results given below lay no claim to great accuracy.
Fine Crystals of Pale Lilac Calcite from Tankerville Mine, near Shelve, Shropshire
Authors: Solly R. H. 
Published: December 2006

The rare occurrence of the primitive rhombohedron r {100} with little or no modification on crystals of calcite has induced me to bring to the notice of the Society some very fine pale lilac crystals exhibiting this unusual habit.These specimens were raised a few years ago from the Llandeilo flags strata in the Tankerville lead mine, near Shelve, Shropshire.
Description of a Crystal of Parisite
Authors: De Grandmaison Guyot 
Published: December 2006

Occurrence. At the Emerald Mines of the Valley of Muso, New Granada, in a gangue composed of anthracitic calcite and pyrites. Lustre, vitreous to resinous ; colour, yellowish brown to honey-yellow. An acute hexagonal pyramid with striations perpendicular to the axis. The crystal measures 84 millim. in length, and 12 millim. in thickness at the base.The pyramid is perfect and its apex is intact.All the specimens of Parisite which have been hitherto received, and are found in European Museums, exhibit a truncated hexagonal pyramid. This section is due to a very easy basal cleavage.
Notes on Minerals from Cornwall and Devon
Authors: Solly R. H. 
Published: December 2006

I obtained this summer a most beautiful variety of fluor spar, which was raised from the 145 fathom level of the Holmbush Mine. It is of a transparent azure-blue colour, and shows well marked fluorescent phenomena, though not so strongly as that of Weardale, Cumberland.Some of the specimens are deep blue in one part and limpid like glass in another ; it was found that while the deeply coloured part was strongly fluorescent the limpid part had little or no effect upon the refrangibility of the light passed through it.
On a Glaucophane-eclogite from the Val d'Aoste
Authors: Bonney T. G. 
Published: December 2006

The number of localities at which glaucophane has been discovered is still comparatively small, so that it may be of interest to add another and to describe the microscopic structure of a rock in which this interesting variety of hornblende occurs.The carriage road between Vertex and St. "Vincent in the Val d' Aoste mounts along the left bank of the Dora Baltea, which, in one part, often called the defile of Mont Jovet, is scarped and craggy. The steepest part of the ascent is between the hamlets of Berrioz and Nus (?). I was walking up this, one day in July 1885, in company with my friend the Rev. E. Hill, F.G.S., when my eye fell upon a rock, which I at once reeognised as a variety of eclogite, composed chiefly of small reddish garnets and dull-green hornblende. We secured specimens, though with considerable difficulty, for the rock was very tough ; made a few observations and passed on.
On Idocrase and other Minerals recently found near Zermatt
Authors: Lewis W. J. 
Published: December 2006

Some Zermatt Guides (Joseph Taugwalder and his brother) made, on a recent excursion up one of the mountains (Pollux ?) in the neighbourhood, the discovery of some very interesting crystals of idocrase and red garnet.The idocrase crystals are of a dark sherry eolour, and are developed in simple forms, the prism-planes m{110}, a{100}, and the base c{001}, being well developed. The edges [cm] are truncated by narrow planes u{111}, and at the corners small planes i{312} are sometimes found. The prism planes are deeply striated, and at the same time the c plane shows more or less coarse squares, which sometimes seem to belong to independent crystals. The sides of the square are parallel to the a {100} faces. The crystals have, therefore, much the character of a bundle of thin pyramidal crystals united together in parallel positions.
The Metallic Ores of Chili
Authors: Kerr John F. 
Published: December 2006

The ores which I have the honour to submit for your inspection were collected by me in Chili. They consist of numerous compounds of copper, silver, gold, &c., and represent the very varied minerals obtained in that country.Besides the primary metal there is usually at least one secondary body of value present.The proportion in which this secondary metal—I mean secondary as regards quantity—is present in metallic ores does not seem to be a mere chance affair, but seems to follow some law. My attention was directed to this matter by the silver ores from the district of “Lomas Bayas” near Copiapó. These ores contain gold in a certain proportion, not in relation to the gross weight of the ore but to the contents in silver.
New Localities for the Mineral Agalmatolite, with Notes on its Composition
Authors: Bell William Hamilton 
Published: December 2006

The rock-like mineral, known as Agalmatolite, derives its name from the Greek word aγuλμa, an image. It has also received the trivial name of Pagodite from Pagoda ; it having been long used by the Chinese as the substance from which they carve their images and pagodas.The earlier mineralogists confined the above names to hydrated silicates of alumina and potash, doubtless a product of the decomposition, or alteration, of orthoclase felspar ; an intermediate stage in its conversion into the kaolin which is so abundant in the Celestial Empire.Jameson, Phillips, Allan, Nicol, and all the fathers of mineralogy, admitted no other substance under the name. Nicol, who was a thoroughly well-read mineralogist, writes : “Many substances are named Agalmatolite which are really distinct;” and he clearly defines the species, which he makes the same as that called Agalmatolite in the present communication.
On the Chemical Composition of the Mineral Bruiachite, found by Mr. Thomas D. Wallace, of Inverness, at Loch Bhruithaich, Inverness-shire
Authors: Macadam W. Ivison 
Published: December 2006

In a paper read before this Society on June 16th, 1885, Mr. Wallace drew attention to this mineral as being found at Loch Bhruithaich, and stated that it was obtained incrusting Barytes.The mineral is clear, beautifully crystalline, with a tendency to a bluish tinge of colour, and very friable.
Barytes from Addiewell, West Calder, in Midlothian
Authors: Trechmann Charles O. 
Published: December 2006

This occurrence of barytes is somewhat remarkable and interesting from several aspects :—The peculiar conditions under which it seems to have been deposited, the limited quantity, and the perfection and richness of the crystallographic development.It was found some two years ago in one of the shale pits of the Young's Paraffin oil Company, and my friend Mr. J. S. Thomson, to whom I am indebted for two of the four or five existing specimens (of which one, I am happy to say, has been deposited in the Museum of Edinburgh), was so kind as to procure for me from the Mining Engineer of the Company a sketch of the Geological Strata of the neighbourhood, in which the position of the beds containing the crystals is indicated (Plate II.).
On a New Variety of Mineral from Cornwall
Authors: Kinch E. , Butler F. H. 
Published: December 2006

Some two years since the authors received from East Cornwall examples of a erystallised mineral presenting features dissimilar to those of any species previously known to them, but presumably referable to Dufrenite. The specimens obtained were from the central part of a narrow neck of "dead ground" (compact ferruginous quartz rock) connecting the much broader E. and W. continuations of a lode, yielding respectively copper and tin ores.The freshest crystals have a vitreous lustre, and vary in colour from almost black to a light apple-green, their sections, however, being of a yellow brown to yellow. Where, as commonly, some superficial chemical change has taken place—seemingly into limonite—the colour is from red to brown or yellowish brown.
Cassiterite of the Straits Settlements
Authors: Hampton J. H. 
Published: December 2006

The tin from the Straits Settlements has hitherto been solely derived from the alluvial deposits, and is consequently in the form of alluvial or "stream" tin—each grain of Cassiterite being separate, and in many cases so considerably water-worn as to afford evidence of its having been washed down for a considerable distance; the angles of the grains having given place to smooth surfaces during their deposition.The largest grains occur on the tops of some of the hills, with a diminution in size noticeable with distance from the hills.
Further Note on Agalmatolite in Gairloch Parish, Ross-shire
Authors: Macadam W. Ivison 
Published: December 2006

In my previous communication I drew attention to an impure variety of Agalmatolite found on Creag Mhôr Thollie, and which contained an excess of silica. A similar body was referred to in connection with Mr. Hamilton Bell's paper on "New Localities for Agalmatolite" as having been obtained from Ballater Pass. In connection with the material obtained at Creag Mhôr Thollie, I expressed the opinion that the agalmatolitie mineral had been formed in the presence of an excess of silica which had become combined with the other ingredients, forming what I then termed a "Siliceous Agalmatolite."During the past summer I have again had an opportunity of examining the Creag, and towards the northmost end found very large masses of the pure mineral.
Note on the Identification of the Scotch and New Brunswick “Albertites”
Authors: Honeyman D. 
Published: December 2006

Prof. Tennant, of London, and I, identified the two "Albertites " in 1862. I was then a Commissioner for Nova Scotia at the Great Exhibition. In the ncighbouring Court of New Brunswick there was a tub full of specimens of Albertite, which were freely given to visitors by Mr. Daniel, the Commissioner for New Brunswick, and myself.It was, therefore, no astonishment when the Professor's assistant put into my hand a piece of "Albertite" as I entered the shop, and asked me what I thought of it. I said, "It is a piece of our New Brunswick Albertite." He replied, it was not from New Brunswick, but from some part of England, and showed me a boxfull that had just been received. The only guide to the locality whence it came were the markings on the lid of the box—" Aberdeen Railway" and Kiltearn.
Supplementary Note on Felspar from Kilima-njaro
Authors: Fletcher L. , Miers H. A. 
Published: December 2006

A Chemical analysis of this felspar, to which our attention was directed by Professor Bonney, and which was subsequently described on crystallographic and optical grounds as orthoclase, shows it to be a sodapotash felspar of somewhat peculiar composition.In the following table, the first two columns give the results obtained on analysis (Fletcher) of two loose crystals, of which the second was a twincrystal of lighter eolour than the first; the next two columns represent the same analyses if the oxide of iron (present as visible enclosures) and the loss on ignition are neglected; the numbers in the fifth column are obtained by taking the means of the numbers in the two preceding columns.
On the Occurrence of Greenockite at a New Locality
Authors: Heddle  
Published: December 2006

More than a year ago I obtained a number of minerals in Boylestone quarry, which lies about a quarter of a mile north-west of Barrhead, near Glasgow.Upon breaking up at home the very unwieldly druses which alone seem to occur at this locality, I found one which contained Greenockite.A single bright yellow crystal only occurs, and it lies so deep in the specimen, between two mammillations of prehnite, that its form cannot be deciphered.I was induced by the urgent solicitations of a local collector, to whom I mentioned the find, to refrain for a time from announcing it. His argument was that the mineral collectors of the neighbourhood should have the earliest chance of being supplied.As I have myself fruitlessly visited the quarry since, and as even the occurrence of the ordinary zeolites is only very occasional therein, I conclude that time must elapse before more crystals are turned out.
Apatite from a New Locality in Eastern Cornwall
Authors: Solly R. H. 
Published: December 2006

In the last Number of the Society's Journal I described some crystals of apatite (francolite variety) from St. Just district of Western Cornwall; I have now to bring to the notice of the members some very fine beautiful crystals of this same mineral which I have received from Mr. Henson.In point of beauty and lustre they far surpass any of the apatites that have yet been found in England.The crystals are in the form of hexagonal prisms, doubly terminated with basal planes and narrow pyramid planes; colour pale bluish green, translucent with strong vitreous lustre.They vary in size from a pin's head to half-an-inch across.
Celestine from a New Locality in Gloucestershire
Authors: Solly R. H. 
Published: December 2006

The great similarity which exists in the crystallographie and optical constants, cleavage, and absence of twinning in the isomorphous rhombic sulphates is especially marked in Barytes and Celestine, but though the combination of forms is sometimes the same, yet up to the present time a marked individuality has bees perceived in Celestine crystals which has made it easy to recognise the one mineral from the other.The crystals of Celestine from near Bristol in the red marl, those associated with sulphur from Sicily, or the large flat more or less bluish tabular crystals from Strontian Island, Lake Erie, are varieties which are seldom if ever mistaken for Barytes.
Notes on the Microscopical Structure of some Eruptive Rocks from Armenia and the Caucasus
Authors: Gylling Hjalmar 
Published: December 2006

In 1881-1882 Dr. A. Brotherus and his brother, A. H. Brotherus, made a botanical tour in Armenia and the Caucasus; the younger gentleman collected a few specimens of rocks met with during their journey, which, on his return, he kindly left to be examined by me.This material consisted of later eruptive rocks; it was scanty, but as it was obtained in places from which we have no earlier information of a similar character, I have not thought it uncalled for to make in the following lines a slight contribution to our knowledge of the geognosy of the regions in question.The microscopical analysis of rocks from the Caucasus made by Tsehermak, Lagorio, and Möhl relate in part to the identical rocks that I shall describe, but the localities are different.
On Crystals of Cuprite and Cerussite resulting from the slow alteration of buried coins
Authors: Fletcher L. 
Published: December 2006

The coins referred to in this paper were received through Professor J. W. Judd, F.R.S., to whom they had been sent by Mr. George W. Shrubsole, F.G.S., Honorary Curator of the Museum belonging to the Chester Society of Natural Science.According to Mr. Shrubsole the Roman coins of Chester are generally found in soil consisting more or less of disintegrated red sandstone and clay : the coins of the find now under consideration must have been buried for fifteen centuries, for such as have been deciphered belong to what is called the Roman Third Brass, and range from Philippus, A.D. 244, to Constantine, A.D. 887. Mr. Shrubsole further remarks that crystals are not found to result from the alteration of isolated coins ; when met with they line cavities between adjacent coins of a pile.
On a Variety of Glaucophane from the Val Chisone (Cottian Alps)
Authors: Bonney T. G. 
Published: December 2006

As I was descending the Val Chisone from the Col de Sestriéres last summer, my eye was attracted by the peculiar colour of an erratic, which was lying on the hillside very near the road. The violet-blue tint, generally indicating the presence of giaucophane, was perceptible, especially in certain lights, but, as it was much less strongly marked than in rocks in which I had previously observed the mineral, I felt doubtful. However, I secured a good specimen, and now find on microscopic examination that glaucophane is present, though it is a pale coloured variety, differing from those which I have hitherto examined.The block was a fairly large one, perhaps more than a square yard in area, and a couple of feet thick. I did not, however, take measurements, as the exact size was unimportant.