of Boston and its Vicinity, 



m 



it is brittle. 



It is rather easily frangible. 



The fragments are splintery, indeterminately angular and 

 sharp edged. 



The specifick gravity is about S.970. 



Chymical Characters. 

 Before the blowpipe it fuses into a white 



speci 



r 



mens^ owing to a large intermixture of Carbonate of Lime^ vi^o- 

 rously effervesce in diluted acids ; the Lime is soon dissolved and 

 the Tremolite remains untouched. 



Geological Situation and Locality* 



■ 



It occurs massive in Carbonate of Lime, at Chelmsford 



Variety II, — ^Fibrous Tremolite. 



4 



Fibrous Tremolite, Cleavelartd^ p. S24. Asbestus Tremolite, Jameson^ vol. i 

 p. 464, Asbestiform Tremolite, Aikin^ p. 234. 



External Characters. 



Its colour is snow white. 



Its lustre is glistening^ and completely pearly. 



It is opaque. 



It is amorphous. 



It yields a slight argillaceous odour when hreatbed upon. 



It is soft, and very soft. 



The structure is delicately capillary, parallel fibrous and 



perfectly fascicular diverging. 



It is brittle. 



^h 



