lost 
teiTeum. 
arcnaceum. 
Alab'.ts- 
trum. 
EARTHS. CALCAREOUS. 25. Gypfum. 
25. GYPSUM. Confifling of carbonate of liine 
united to fulpliuric acid: light, very loft, a little 
frigid: not commonly efi'ei vdeing with nitric 
acid, melting with difiK ul tv in the fire, biitcafiiy 
crumbling to powder, which caufes no ebullition 
in water but forms a pafte hardening and diftend- 
ing by expofure to the air. 
Pow'dery, of a white colour. 
Calx Giir. Syft. nat. xii. 3. p. 207. n 6 , 
I'arinaceou.' GyjJium. Kinvan mihei', i. p. 120. 
GypieuUf earth. Acbme'J/er miner. I - ^.240, 
Earthy Gyptuin. ‘1 homjhn chern. 3. p. 615. 
found in the liflures ol gypfcous rocks in Saxony, in the form 
of a white friable loole powdery fubl’atice, and fecins to ori- 
ginate from cryliiillized felenite, and will not concrete with- 
out being wetted: feds dry and meagre, hardly links in 
water, is^ not gritty between the teeth ; wtien heated below 
rednefs, it becomes ol a dazzling white : has no lullre or 
trar.fparency. 
Confining of white uiftincl fubdiaphanous granulations. 
Calx alaballrina. Syfi. nat, xii, 3. p. 208. n. 7. 
found in Thuringia, and originatrs from Alaballer which has 
crumbled to powder : it refenibles the lalt, except that its 
particles are larger, rcfembliiig fmall grains of fand, and are 
very giiuy between the teeth. 
Compa£t, dry and meagre, a little fliining, breaking into 
indeterminate fragments, of a common form, receiv- 
ing a polilh. 
Gypfum partic. impatp. Sy/ 1 . nat, xii 3. p. 45, j. 
Gyplum part, minim. Wall.fyli. 1. /. 154. b. i. 
Aiaballrum. Vogel mineral. 119. 
Compaft Gt pfum- Kirovan miner, \ , p, 121, 
Alaballer Schmeijfer mineral. I. p. 240. 
Compadt Gypfum. Thomfon chem. 3. p. 61 j. 
2. Stalaflites gypfeus. Syft. nat. xii, 3. p. 184. r.. 5. 
found in Derhyjhire, Perfia, and various parts of Rujla, Spain, 
Tufeany, SUily, and other places, in llratified mountains: 
colour various, fometimes fpotted, incerfeded with veins, and 
deplfted with various colours : doe.s not effervefee with acids, 
when pure, is fnfter than marble, and does not take a good 
polilh : texture ftuvery and glittering; fpecilic gravity from 
1,872. to 2,288. contains carbonate of lime 32. fulphuric 
acid 30. water 38, ^ 
