100 Canadian Record of Science. 



in masses of gray, white, and colorless radiating fibres. 

 Before the blowpipe its conduct is highly characteristic, 

 the heated portion quickly curling up in worm-like forms. 

 A portion was analysed by the writer, and the results are 

 stated below, together with the analysis as given in Dana's 

 Mineralogy of a specimen from Iceland and of one from 

 Chili, for comparison : — 



Black Lake. Iceland. Chili. 



Silica 46.24 46.76 46.30 



Alumina 26.03 26.22 26.90 



Lime 14.09 13.68 13.40 



Water 13.88 13.94 14.00 



100.24 100.60 100.60 



This Scolecite from Black Lake is of considerable interest, 

 being, it is believed, the first Zeolite found in the dykes 

 cutting the serpentine of the Eastern Townships, and also 

 because, so far as can be learned, it had not hitherto been 

 known to occur in Canada. 



Notes on Asbestus and some Associated 

 Minerals, 



By J. T. Donald, MA. 



Asbestus mining operations which are now extensively 

 carried on at various points on the great serpentine belt, 

 which extends " north-eastward from the Vermont boundary 

 for some distance beyond the Chaudiere river," afford excel- 

 lent material for the study of the problems as to the origin 

 and nature of the serpentines and associated rocks. 



On this subject much has been written, and the majority 

 of those who have studied the rocks of this region consider, 

 in most cases at least, the serpentine an alteration product 

 of some form of dioritic rock rich in olivine. The asbestus, 

 which is found throughout the serpentine in irregular veins 



