U5 

 MONDAY AFTERNOON LECTURES. 



The course of Elementary Monday Afternoon Lectures has been 

 unusually successful during the past season, the attendance and after- 

 discussion being particularly satisfactory. The first of these delivered 

 upon January 7th was by Mr. F. R. Latchford upon Conchology. 

 Owing to a serious illness, Prof. Macoun was unable to deliver a lecture 

 on this day upon the subject of Ornithology. Mr. Latchford kindly 

 consented to take charge of the class and delivered a most instructive 

 address, in which he gave the club the benefit of his experience in 

 collecting shells and preserving them for the cabinet. The second 

 lecture, on the 21st of January, was upon the subject of Geology by 

 Dr. Ells. Tliis was .so highly appreciated that tlie publishing com- 

 mittee was requested to print it in extenso, which was done in the 

 January number of the Ottawa Naturalist. 



The second lecture on Geology proved no less interesting than the 

 last, as Mr. Henry M. Ami dwelt with the practical side of the science, 

 Applied Geology. In a clear and concise manner Mr. Ami sketched 

 the history of Ottawa from the earliest times up to the present, and 

 arranged the various formations or sub-divisions of strata into three 

 grand natural divisions, viz.: The Laurentiart, or Archcean ; the Palaeo- 

 zoic ; the rost-Tertiarij. Each of these was treated separately, and the 

 characters of each described in such a manner as to be easily recognized. 

 Specimens of the formations comprised in these three great systems 

 were passed round and examined. Interesting localities to visit and 

 study, worthy of careful examination, were pointed out, and an earnest 

 appeal made on behalf of geological research and enquii-y, urging the 

 members to devote some attention to geology, as the field was most 

 inviting and the work promising. Special stress was laid upon the 

 economic value of the several formations discussed and the occurrence 

 of such minerals as iron, mica, graphite, apatite, galena, and many 

 others in this district, besides the cement stones and marls with fine 

 building stones which show how important a study geology is. A 

 lengthy and animated discussion followed Mr. Ami's remarks. 



Mr. John Stewart thought that the long ridges of boulders, die, 

 which occurred at Hull, Que., near Lake Flora were .Q^j;gj^||->|(jrigin, 



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