164 



THE FARMER'S MONTHLY VISITOR. 



The lead ore is but 8 inches uide, so fiii- as it 

 can lie seen, Imt tlie zinc ore is between 5 and 

 feet in the clear. 



In workini; I'jis mine, the lead may lie thi-own 

 aside and can lit smelted when a sufficient sup- 

 ply is obtained. It will yield according to my 

 analysis, one |)ouiid of silver to one thousaiMl 

 pounds of the ore. If the lead is converted into 

 litliarge it may be subsequently reduced to me- 

 tallic lead in the furince. The ore contains 85 

 and yield 7'J per cent, of lead. 



Tin or^ or Jackson. 



On the estate of Mr. Enstman of Jackson, I 

 discovered ;i l.ir;.. ii ;iss of tin ore, which was 

 blasted (-III wliili I'liMiiiiiig specimens of the ar- 

 senical ]i\nirs Hliiili iMcursoii that estate. 



The olf (■cl^^i,-ts of the massive, crystallized 

 and granular oxide of tin, and is associated with 

 the arsenicid iron, but is not mixed with it. Hav- 

 ing reduced a lew of the crystals to metallic tin 

 while in the town of Jackson, I subsequently 

 made u minute chemical analysis, and several as- 

 says of the ore in mass, and obtained, after pulver- 

 izing and washing, from 30 to 50 per cent, of tin. 



By assay in a brasqued crucible I obtained 

 from 57 grs. of the washed and roasted ore 22 

 grains of pure metallic tin, which would be equal 

 to 37 percent, of tin in the ore. 



By washing the |)ulverized ore I found that on 

 an average, 53 per cent, remained, w hich was 

 composed of fragments and grains of oxide of 

 tin. The pure crystiilli7ed oxide of tin, act 

 ding to Beudant, consists of 



Tin, 76.67 



Oxygen, 21.33 



100.00 

 between 



In order to make a compav 

 crystals of oxide of tin from Jackson, and those 

 from other localities, I requested Mr. J. E. Tes- 

 chemacher, who was very familiar with all the 

 Cornish varieties, to take some of ours and to 

 measure them by the Reflecting Geometer. He 

 politely acceded to my wishes, and presents the 

 following observations. 



Boston, Dec. 4, 1840. 



Dear Sir: — Below you will find a drawing, 

 much eidarged, of the form of most of the crystals 

 in the specimens of tin ore discovered by you 

 in New Hampshire, which 1 have examined. The 

 planes are not sufficiently free from strite to jiermit 

 the use of the reflecting Goniometer in ascer- 

 taining the angles ; the measurements are there- 

 fore those of Phillips, of the accuracy of which 

 I entertain no doubt. The form is that of a ma- 

 de of the square prism, with a pyramidial sum- 

 mit, arising from modifications of an obtuse oc- 

 tahedron with a square base, the primary form 

 of tin oxide: P. and P. the only remains of this 

 primary. The figure represents a made of only 

 two crystals ; the originals are composed of sev- 

 eral united in the same way. This is, I believe, 

 the most conmion of the crystalline forms in the 

 tin deposits of other countries, and appears to me 

 a reason for supposing the deposit in New Hamp- 

 shire to be large, which L«hould have doubted 

 had the crystalline forms been those of rare oc- 

 cnrrence elsewhere. I return the best crystals I 

 could select from the specimens you were so kinc 

 aj to give me. Yours sincerely, 



J. E. TESCHEMACHER. 



Dr. C. T. Jackso.x, Boston. 



that lias yet been (bund in which there was a no- 

 table jiroportion of tin. 



This should stimulate to renewed search for 

 other veins of tliis valuable ore, which 1 doubt 

 not will be found in workable quantities in some 

 parts of the Slate when more eyes are made fa- 

 miliar with the appearance of an ore v\liich has 

 not llie least semblance to a metal, and hence has 

 probably been herelolore overlooked by those 

 conversant with minerals. 



Thus far the small tin vein of Jackson mu.«I be 

 looked upon only as a valuable guide, lor it does, 

 not contain an adequate quantity ol' the ore for 

 supplying a furnace. 



By exploring the arsenic veins more tin ore 

 may yet be found, and the arsenic ore will repay 

 the expense or labor of extracting it, since it 

 will sell for $40 per ton in chemical works \> here 

 it is used for the manufacture of arseniate of 

 potash. 



The arsenic ore of Jackson is found on the es- 

 tate of Mr. Eastman, and is a vein varying from 

 1 to 8 inches in width, and is of unknown but 

 great length. 



This ore, on chemical analysis, yields 60 Jier 

 cent of arsenic, 38 jier cent of" iron, and a small 

 proportion of sulphur. 



On distillation, it gives up more than half its 

 arsenic, the remainder being combined with the 

 iron so as not to volatize. I obtained readily by 

 distilling the ore in an earthern retort, 35 per 

 cent of brilliant crystals of pure metallic arsenic, 

 and some octahedral crystals of sulphuret of ar- 

 senic in the states of orpiment and realgar, those 

 .sulphiirets crystalizing farther down the neck of 

 the retort, they being more volatile than metallic 

 arsenic. 



The arsenic ore is very heavy, and occupies so 

 little bulk in proportion to its weight, that it may 

 be transported lo market at a sufficiently low- 

 rale. 



It will prove valuable as an ore from which 

 pure metallic arsenic may be obtained for use in 

 the arts, especially in tlie manuliicture of shot, 

 arsenic being always mixed with the lead 

 make it granulate when poured through the 

 selves in the shot towers. 



Granlxar Quartz. 



This mineral aboun<ls in various parts of New 

 Hampshiie, and is at present wroueht only in 



the town of Unity, by Daniel M'Clure. (S 

 page 6'Jof this Rejiort.) During the last year Mr. 

 M'Clure ground, bolted and sold 35 toiis of his 

 granular quartz to the sand-iiaper works of Rock 

 iiigham, Vl. 



He prepares three sizes by means of a boltin- 

 machine, which sizes correspond to saiul papers 

 Nos. I, 2 and 3. Specimens of this mineral thus 

 prepared have been obtained for the State cab- 



A fine polishing powder, equal lo emery for 

 all ordinary uses in polishing metals, &c., is also 

 put up in papers of one pound each, which pack- 

 ages sell for 12 cents. 



The same kind of granular quartz which serves 

 for the manufaclnre of sand paper will also an- 

 swer for the manufacture of rifles for sharpen- 

 ing scythes. It is al.so a good substance for mix- 

 ing with paint in order to encrust the pillars of 

 public buildings so as to prevent injury lioni the 

 knives of idlers. 



The finest powdered quartz has also been suc- 

 cessfully mixed with white lead in large quanti- 

 ties, and is said to answer the purpose better 

 than barytes. 



I have used Mr. M'CIure's granular quartz for 

 mixing with fine clay in the manufacture of cru- 

 cibles and niuflle.s, which are employed in my 

 laboratory, and find it to be of excellent quality 

 for that purpose. 



It may also be used by dentists who require an 

 addition of quartz for the formation of niiiieial 

 teeth from felspar. It will also make an excel- 

 lent body for fire brick when mixed with refrac- 

 ry clay. Where a perfectly white stucco or 

 plastering is wanted for ceiling it is an excellent 

 article for mixing with the lime in the place of 

 sand. 

 p.^„,„ ,,,„ r . It has a vei-y sharp grit, and is one of the best 



From the foiegoing remarks it will appear that materials for sawing and grinding tnarble. 

 Zl r,TrJTl '^'^ ^'T'^ ''''= «^i'''«"ce of an When fused with a large proportion of potash 

 ore of tn in New Hampshire, and I believe that, or soda, it forms a glass soluble in hot water, 

 tli'^",^,' f""^-^ '"'"^"',f5'«'"^ have been seen on which, if spread upon wood, work will efiectuallv' 

 the garnetrockofHaddatn, in Connecticut, that prevent its taking fire. 



proper tin ore ' The refuse granular quartz is also used in ths 



o/150d.«m. /on e ISSd. 32m. non • 135d. Plines 

 casually St] iated. 



this may be considered the firs 



manufacture of glaes. The locality mentioned 

 on (i/th page of this Report, is only 30 miles lioin 

 Keene glass works, and will doiditless be carried 

 there Uir the mamifarluie of glass, and the local- 

 ity \^ ill yield an exliauslihle su|ipl\. 1 have men- 

 tioned some of the various uses for w hich this 

 mineral may be employed. It is not improbable 

 there may be numerous other arts in which it 

 may be used advantageously. It must be remem- 

 bered that only a few years have passed since 

 granular (juartz was ranked among the useless 

 minerals, ai«l we may be led to a more full be- 

 lief in the principle that "nothing is made in vain." 

 although we may not at the moment discover 

 how they may be employed for the service of 

 inaiiUind. 



Granular quartz quarried in masses is worth 

 on the spot $1 50 per ton. Ground and not bol- 

 ted, $5 per ton. Bolted, $20 per ton. It grinds 

 very easily in a common grist mill with granite 

 stones, but bojts slowly on account of its great 

 weight; hence the increased cost of the bol- 

 ted and assorted powders. 

 Mica. 



Mica is obtained in large quantities in the 

 towns of Alstead and Grafton, where regular 

 quarries are wrought for the purpose of extrac- 

 ting it flom the coarse granite rocks. 



'I'he Alstead quarry is owned by -ftlr. James 

 Bowers,of Ac worth, who pursues the business in 

 a in-ofitable manner, and sells from 800 to 1000 

 dollars worth per season, at the rate of from 2 

 to 3 dollars per lb. Ho supplies the Boston mar- 

 ket with a large quantity of this useful mineral. 



The Grafton quarry is wrought by |iersons res- 

 ident in Boston, and their principal market is 

 New York. They quarry and sell about $1000 

 worth per annum, and obtain from 2 50 to 3 per 

 lb. for the trimmed plates stutable for use. The 

 rough irregidai plates are sold at prices vailing 

 from 1$ to 2$ per lb. 



Formerly we depended upon the quarries of 

 Russia for this valuable ruincral, and it was 

 known in the market under the names of Musco- 

 vy talc, or isinglass. It is employed on board the 

 Russian ships of war in the place of glass, and 

 has the advantage of not being broken by the 

 concussion produced on filing catinon. In this 

 country we employ mica for the manufacture of 

 lanlhorns, and thotie of the Boston fire compa- 

 nies are generally made of New Hampshire mica. 

 ■ It is used also lor stove windows, and frir the 

 manuliicture of caids, for the mariner's compass, 

 it having the property of never warping by iriois- 

 ture or dryness. The best compasses are made 

 of a single clear plate of mica, under which the 

 magnetic bar is secured, and on the upper side 

 the printed plate bearing the cardinal points, is 

 pasted. Mica has also been used to protect ships' 

 liottoms from worms, but to a very limited ex- 

 tent, copper being better liir that purpose. 

 Chlorophyllite — A new Mi.neral. 



Chlorophyllite. 1 have given this name to 

 a new mineral found near J.Neal's mine in Unity. 

 The name is derived from the Greek words sig- 

 nifying gree7i folia, a name which is eminently 

 characteristic of the species. 



It occurs in tabular, or short six sided prisms, 

 arranged in folia or in columnar masses, result- 

 ing from the openness of its natural joints. 



The extremeties of the prisms or tables are of- 

 ten covered with thin layers of mica-, which cir- 

 cumstance has caused some mineralogists to mis- 

 take the true nature of the inineral. 



It cleaves readily into regular six sided prisms, 

 with resplendent surfaces. 



On trying its hardness it was found to yield to 

 the kiiitii readily, but it scratches glass, and is 

 harder than phosphate of lime. 



Its powder is of a very pale greenish white. 

 Alone before the blow pipe it glazes slightly on 

 the surface, but does not fuse entirely. 



It is fusible with carbonate of soda, with slow 

 efiervescence, and forms an opaque greenish 

 enamel, which becomes of a darker green in the 

 reducing flame. 

 Its specific gravity is 2.705. 

 Mr. J. D. Whitney analyzed a specimen of it 

 in my laboratory, and obtained the following re- 

 sults. One hundred grains of the mineral con- 

 sist of 



Water, 3.000 



Silica, 45.'J00 



Phosphate of Alumina, 27.(i00 



SlagMcsia, O.fiOO 



