Lake-on-the-Mountain. 93 



and the forces which gave rise to this fault have extended 

 over a /Sufficiently wide area to give some subterranean 

 connection with higher ground very many miles away. 



The results of the readings of the thermometer were 

 even more interesting. Whilst the waters of the Bay of 

 Quinte would be slightly warmer than those of the main 

 body of Lake Ontario, the difference would not be great, 

 and for the purpose of comparison with temperature 

 results in the Lake-on-the-Mountain, readings in the main 

 channel opposite Kingston may be taken as fairly repre- 

 senting the temperatures of the waters of both the Bay of 

 Quinte and Lake Ontario at similar depths. In this main 

 channel, during August of this year, whilst the surface 

 temperature ranged generally around 72" F., the bottom 

 temperature at a depth of 78 feet was 56^^ to 57i° F. 

 Last year, on August 18th, at 4.25 p.m., and under about 

 the same conditions of sky, the water in the same channel 

 was 74^° F. at the surface and 72'' F. at a depth of 54 feet, 

 and on 25th July, 1889, 67° F. at a depth of 72 feet— the 

 water in this main channel during 1899 being much colder 

 beneath the surface than usual. At the Lake-on-the- 

 Mountain, on the other hand, on the day of my visit, with 

 the air bright and warm and but few clouds in the sky, 

 the results of numerous readings showed the temperature 

 of the surface water to be 74^° F. ; at 30 feet depth, 69J° 

 F. : at 45 feet, 47° F. ; at 60 feet, 43^ F. ; at 72 feet, 

 431° F. ; and at 99 feet, 42° F. Whilst the surface of the 

 Lake-on-the-Mountain is thus not very different in tem- 

 perature from the surface of the main channel at Kings- 

 ton, the temperature at a depth of 78 feet was about 15 

 degrees colder than at a similar depth at Kingston this 

 year, and 24 degrees colder than at this depth iu 1889. 



The striking fact is shown by these results at Glenora 

 that for the first thirty feet of depth there is comparatively 

 little change in the temperature of the water : that at 

 between thirty and forty-five feet there is a rapid fall in 



