108 Allen and Clement — Role of Water in Tremolite. 



eral which had been heated below 850°. The water in all the 

 specimens is lost gradually as the temperature rises without 

 any sudden change of properties or loss of homogeneity.* It 

 cannot, therefore, be chemically combined, even though it is 



Temperature. 200 400 600 800 1000 



I. Tremolite from Ham Island, Alaska. 



II. " " Ossiniug, N. Y. 



III. " " Edwards, N. Y. 



IV. " " Russell, N. Y. 



* Making the above-mentioned reservation regarding the specimen from 

 Russell, N. Y. 



