70 Canadian Record of Science. 



These drift deposits are, moreover, often highly fossil- 

 iferous, a great many species, especially of sea shells, 

 occurring in them. Such occurrences are of the greatest 

 importance, and should always be noted, the precise 

 locality and, if possible, the height above sea-level or the 

 relative height as compared with some fixed point, as, for 

 instance, the McGill College Observatory, being ascertained. 

 The presence of boulders of any peculiar, rare or striking 

 variety of rock, at any point, is also worthy of attention, 

 as it is often possible by means of these to deterndne the 

 local direction of the ice flow during glacial time. 



All information concerning the deep artesian borings 

 put down from time to time in and about the city is of 

 the greatest value, and should be communicated to the 

 Society. Samples of the borings from various depths 

 should always be secured if possible, and carefully 

 preserved. 



And, finally, the study of the influence of the geological 

 structure of the vicinity upon the topography of the city 

 and upon its history and development will be found to be 

 of the greatest interest. The very location of the city, 

 the courses of its streets and the distribution of its popu- 

 lation will be found to have been directly influenced by 

 o-eoloffical causes, which often date back almost to the 

 beginning of geological time. 



It will thus be seen that the members of our Society 

 have presented to them a host of geological problems, to 

 the solution of which they may make contributions of 

 permanent value. 



