BY T. GRIFFITH TAYLOR. 



341 



full, the Lake has an area of five square miles, and is thus very- 

 much smaller than Lake George. 



■:.:.:::::::::-:>^^, 



Fig. 5. — Map of Lake Bathurst showing its physiography 

 (Feb., 1907). The boundary between the granite and quartzite 

 is indicated approximately. 



During February, 1907, I made a careful survey of the Lake, 

 for the purpose of determining the area covered by water, and 

 the character of the dam to which the lake owed its origin. 



Leaving the road and approaching the Lake from the south, one 

 reached a zone of coarse quartzose sand with subangular frag- 

 ments of quartzite, evidently derived from the neighbouring hills. 

 Then came a zone of grey sticky mud about 200 yards wide, and 

 finally the water was reached. This was very brackish and covered 

 with a slight scum. The mud gave off a musty smell, recalling 

 that of certain guano reefs, and was possibly due to the same 

 cause, since a flock of gulls were swimming in the northern 

 portion of the lake. Journeying eastward across the Chain o' 

 25 



