110 Allen and Clement — Role of Water in Tremolite. 



Friedel's data for chabazite, analcite and mesolite are plotted 

 in figs. 1 and 5. The similarity in the form of the curve of 

 mesolite to that of tremolite will be seen at once. Friedel did 

 not class the zeolites with solid solutions, but Tammann did so, 

 and as such they are now generally regarded. They have 

 remained as a unique class of minerals. The behavior of trem- 

 olite now shows that the zeolites are not the only ones which 



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Curves showing loss of water from analcite (I) and chabazite (II) at differ- 

 ent temperatures. Plotted from Friedel's data. Bull. Soc. Min., xix, p. 376, 

 1896 ; xxii, p. 14, 1899. 



contain dissolved water, and it occurred to us that the class 

 might not be uncommon. 



Dissolved water in other minerals. — From this standpoint, 

 quartz, wollastouite, garnet, adularia, kupfferite, diopside and 

 beryl were studied. They were coarsely powdered to avoid 



