GYPSUM. ' 
se is very foft ({eratched, like the following, by cryftal- 
lized carbonate of lime); mild, eafily frangible, meagre and 
cold to the feel. Sp. gravity 1.872—2. 288, Kirw.—2.256, 
Gerh.—1.300, James. 
‘The proportion of the patient parts is fated by Mr. 
Gerhard to be the following 
im 36.00 
Sulphuric.acid 48.00 
Water 16.00 
100. 
It is found in England, in | Dexbyhire &e. 5 in Lower 
n Mansfeld; in Th 
in Wiirtemberg, at Tubin- 
;in Suabia, at the abbey of St. Blafius ; in Silefia, at 
et a Freiburg, &c. 3 in Bayaria, at gga 8 tc 
in ate 3 in Selaborge on the Flachenberg, at Duren ber 
iy sori t Shottwein, iS mes &c. 3 in Hun n- 
» Liineb &> 
nd, at Wielitzka, Ke = 
mixed with agreed and foliat 
metimes feen to p 
This fu blancs = ard we a in fculpture and archi- 
ea Sh is (toget odifications of foliated 
phe Ses pi gseinaiie: the ancients 
paca er be Sa term cope (es to the gypfum, and to 
feveral r ee coloured and re rieties of ftalactitical 
uctions 
ed epi into which it is 
~The white Va/a unguentaria of ~— an- 
_cients, to kandi ais e name of alabattrites was given, 
“probably in pee Hap of the white acon abatter. "The 
walls of the t of Fortuna Seia were of a ftone which 
“we have sa Bad is was likewife compact gypfum ; 
interi edifice, though without windo 
‘that are remarkable for their tranflucidity ; ; fo that if alamp 
“be placed in’ them, a pleafing faint light is diffufed over the 
“room —.. are kept 
The following caariuth of Antares alabafter are men- 
“tioned as balcaptible:of 
=~ White. ome siebaibes i Pyrenees : : Bical is 
: perfect fhow Ages granular 5 ; the grain fine and 
of Bofcadon, n ear Embrun, i in the 
the High Alps. Rumcihelie tact a fine 
Sa watrece? adaesboon fufceptible of a good polifh. 
“Phe ftat 
the a de Lesdiguiéres, i in the cathedral of Gap, i is 
con 
* sg he" alabatter of the river Nifo, i in ic edyeicol a light- 
the preceding fub-fpecies, but it is lefs frequently 
veins on “frase of co 
grey colour, diverfi fied with green and yellowifh Soba Ai 
other good Sicilia - gypfeous alabatter is that found at Toar- 
Val Demona, on the fea-coaft ; it is sarki 
deep yellow waved tlreaks. 
The whitith alabafter of Riquevire, in Alface, is found 
in rounded maffes mixed with other coloured varieties 
of compact gypium, to which aaa it is preferred, * the 
artiits employed in working t 
"he alabaiter of the ifland of Gora; near Malta 
light yellow colour, with white waved ftreaks, and Ase 
ranfluci 
The alabafter of Lagny, near Paris, is of a yellowilh- 
white colour, tranflucid, and of coarfe granular fraétures 
which makes its fragments appear as if they were full of 
cracks ; notwithftanding this, it is very firm and durable. 
- is alfo often traverfed by blackifh-grey veins. This, alabat- 
ter, which takes a fine polifh, is frequently employ ed at Paris 
for vafes, flabs for tables, &c. There are fome fine white va- 
rieties = white alabaiter in Derbythire, and other parts of 
-Englan 
<3 rous gypfum, F. afriger gyps, and calcareus sipfiem 
betes Wern. Chaux fu Vatee Sfobreufe, Hay, 
> fibrofo, Napion. Stral-gyps, Swed. EB le 2! 9 rai , 
c. Germ. Striated or fibrous gypfum, &c. En, 
This fub-fpecies prefents a pe fair - - colours. 
It scout of fnow-white and of greyifh, yellowihh, reddith, « 
and greenifh-white cc#our; befides which it has bee ad 
ferved afh-grey and light yellowifh and grecotn 
hyacinth, tile, and brown ikewtle honey. a 
yellow and oil-green. 
combined in fpots, ftripes, and veins in the fame manner 
as in the compact gypfum. ; 
It occurs maflive, but generally only in fia layers : aifo 
dentiform, and in Recihily curled fbrous or plumofe ex ex- 
crefcences, fometimes refembling the head of acrofier, in 
Derby thire and fome other mee of England, in the Harts 
at Schemitz in rs 
-Its internal leftre varies Bes liftening to fhining and 
eae ; Ps is often like the luttre of fattin and mother 
ash 
curved, feldom radiately diverging. 
riety, the longitudinal fraéture of which is fibrous, see 
_tranf{verfal fraéture is foliated 
paige occas eel angular, moftly ap oat fu 
to long-fplintery ; they ee f.mni-tran{parent. , 3 
‘tis very (oft sand eafily frangible. Specific gravity, ae 
g to irw an, 2.3C0 ofe of 
The Localities of fibrous gypfum are the fame writ thof 
‘met with. 
The ey seotioned aboye, as having a dout faa 
is found at W ear Eifleben, in § Saxony 3 8 ei 
green ae ccurs ne , in “LE hens 
gypfum is found on mount Saléve “Geneva. 
is fub-fpecies halen s for the ek oat to she nee 
formation of gypfum. Belid es layers, 
with n the fhape of {i 
al, Xe. ; 
eyplu, it occurs alto 
It is fometimes ufed for eae ie purpofess 
nufactured int to fmall box . When cut 
polifhed, it prefents ioneiing. like the locomotise ! 
i cat’s-eye, under which name fuch polithed re 
metimes 
4. Foliated gypjum, blatriger expt, eal areus sbi 7 
