EARTHS. CALCAREOUS. 12. Spatum. 
79 
Found in the warm baths of Hungary, Wijhadin, and other 
places, often in fuch quantities as to fill up the canals and 
dudtsj more frequently white than tinged with any other 
colour ; is more or lefs compadl, and fometimes fo hard as to 
receive a fine polilh. 
Oreanr. Confifting of very thin diaphanous fcales. 
Porus pulverulentus. Gerhard miner, p. 45. r. t. 
Found principally in warm fprings, containing cakareouf 
earth, OB the furface of which it floats like a pellicle. 
'^staceuu Confifting of the aggregate fragments of Ihelk. 
1. Compact and harder. 
Teftaccous Tiifa. Kir'zvan miner. 1. p.y 9 ’ 
Found in the neighbourhood of Syracu/e, Palermo, and the pro- 
montory of Pofioro in Sictly; white or yellowifh-white, ex- 
ceeding porous and brittle, formed of various ihells broker. 
* and compafled together. 
z. Softer and not compaft. 
Marly Tufa. Ktr-ivan mineral. l. /• 180. 
Found in moil parts of Europe, yellowifh-white, refetnbling 
mortar, without luftre or tranfparency, and very porous; 
frafturc earthy. 
12. SPATUM. Confifting of carbonate of Unie, a 
larger propoition of carbonic acid gas, and wa- 
ter; lamellous, fliining, parafitical, foft, lightiftj, 
breaking into rhomboidal fragments: crackling 
in the fire. 
A. Of a common figure. 
*P«cum, Opake or nearly fo. 
Spatum Solubile. Syft. nat. xii. 3. p, 49. u. 5. 
Spatuni rhomboidale. Wall. fyft. min. 1. p. 137. n.i, 
Spatum calcareuni. Cronit. min. feel. 10. 2. b. 
2. With the fragments irregular. 
Spatum calcarium. Syst. nat. xii. 3. p, 49. c. 7- 
3. With a variable luftre. 
Spatum fugax. nat. xii, 3. p. 49- « to. 
Common Spar. Kirnuan miner. S. p. 86, 
Calcareous Spar. Schmei/ier min. i. p. tzo. 
Calcareous Spar. 'I'homjon chem. 3. p. 609. 
Found in Plorivay, SHueden, Germany, En>Al«,erlaiuJ, and Hem- 
gary, moft commonly wiiue, fometimes cinereous, blucifh„ 
grceuilh, yellowilh, red, or blackifh. The variety 3j changer 
its lultre with refpcfl to its pofuion in the light. 
