180 ROYAL SOCIETY OF CANADA 



HenoBj possibly, one reason l'or the lack of calcareous fossils in tlie pre- 

 Cambrian formations." 



It ie not tlie purpose, however, of the writers to discuss the com- 

 position of the wat-er from the standpoint of the geologist, but merely 

 to place on record analytical data which may prove of value not only 

 in the solution of geological problems, but also in the consideration of 

 sanitary and industrial questions. 



