394: Harrington — Composition of Canadian Amphiboles. 



Neither mineral was examined for fluorine. 



The similarity in composition of these minerals from eruptive 

 masses twenty-five miles apart is striking and so is the general 

 resemblance in composition to the " basaltic hornblendes " from 

 a number of European localities as given by Schneider.* 



Department of Chemistry and Mineralogy, 

 McGill University, Montreal. 



* Zeit. fur Kryst. u. Min., xviii, 579, 1891. See also paper by Dr. F. D. 

 Adams, entitled ''The Monteregian Hills, a Canadian Petrographical Pro- 

 vince,'' which is about to appear in the Journal of Geology. 



