T A B. VIII. 



CALX petrosa. 

 Lime Stone. 



Class 2. Earth. Order 1. Homogeneous. 

 Gen. 1 . Lime. Spec. 1 . Carbonate of Lime. 

 Div. 3. Amorphous. 



Sym. Pierre a chaux commune. Born, v. i. 284. 

 Kalxstein. Emmerlmg, v. 1. 437. 

 Compact limestone. Kir. v. 1. 82. 

 Chaux carbonatee grossiere. Haiiy, v. 2. 166. 



Limestone, generally speaking, is carbonate of lime, 

 harder than chalk, often containing 10 or 13 per cent, of 

 clay or iron. If so much as 15, Mr. Kirwan says it should 

 be excluded, as scarcely affording good lime in burning. 



Upper figure. Ketton-stone, found in abundance at Ketton 

 in Rutlandshire. It is remarkable for its singular ac- 

 cretions in the form of fishes roe, whence it is often called 



c 



