of Boston and its Vicinity. 



iSY 



§ Very soft, yield to the nail. 



t Yield a hlackhh sla"- or enamel 



SPECIES 



Subspecies 



XIII. — Aslestus. Fibrous ; flexible ; unctuous. 



XVI. 



xn. 



XV. 



I 



I. 



II. 



Common Chlorite. Blackish green; glimmer- 

 ing; unctuous. 

 Chlorite Earth. 



Var. 1. Fotter^s Claij. Friable, earthy fracture j strong ar- 



dllaceous odour. Plastic with water j melts into a 



si ag. 

 t| TieU a whitish or greenish glass* 



4 



Var. 2. Fibrous TremoUte. White j pearly ; delicately fibrous. 



Steatite, Grey, green ; very greasy feel ; uneven and 

 splintery fracture. 



w 



CLASS II.— SM.lJSrE FOSSILS. 



t 



Sapid and soluble in water. 



Frecipitated from their solution in water by a carbonated Alkali, 



Sulphate of L 



Greenisjb 



gent 



CLASS llh—IJ>rFLAMMABLE 8 UJB S TAJTC E S . 



t Combustible with fame, leave no residum. 



I. 



I. 



Carhiretted Hydrogen. Gasseous. 



^ Comhistible with fame, yield a large bulky ash, and pungent odour, 



IL 



Var. 1. Fibrous Peat. Brownish ; spongy ; light. 

 Var. 2. Compact Peat. Blackish ; earthy. 



