tHYSiCAL AND LITERARY. 2j 



EX PER. XX. 



Xhe marles of Experiment 9. id. ii« 

 fuffered, in their natural ftate, fcarce a-^ 

 tiy perceptible changS from water ; but, 

 tvhen fufficientiy burnt, they fwelled and 

 fell down in water like lime^flone. 



£ X P E R. XXI. 



A drachm of fhell-marle, Experiment 

 14. \yas by burning reduced to 42 grains, 

 and then fpontaneouily yielded a flrong 

 lime-water. 



EroM thefe Experiments, it appears, 

 that the calcarious earth of marie is e- 

 qually calcinable to quick-lime, whether 

 it is expofed to the adlon of fire before: 

 or after its feparatioa from the other' 

 earths. 



It is now fufficientiy evident, that thei 



nature of marie has * a very intimate afE- 



Vol. III. D nity 



• By mar'es I mean fuch calcarious fubrtances as are: 

 trifibijr reduced to pcwder by the iLfluencecf air and mo!-- 



Tiars, 



