352 Canadian Record of Science. 
unsurpassed elsewhere in Canada, while at the lake margin 
there are lovely scenic effects particularly in the evenings 
when the purple hills are brought into bolder relief by the 
brilliant tints of the setting sun and are mirrored in the 
waters of the lake. 
Whilst the surrounding mountains and glens have an 
interest to the botanist, and the whole environs of the 
lake present to the geologista peculiar record of the past, 
the waters of the lake have in their temperatures a feature 
of interest to which, in a word, I would like to draw 
attention. Lake Memphremagog has a length of about 
thirty miles, an area of thirty-seven square miles, and, 
according to Sir William Logan, a surface level of 756 feet 
above the level of the sea. Lake Superior, with its cold 
waters, is in higher latitude but is only 600 feet above the 
sea level, whilst its deeper depths sink far beneath it. 
The smalier and shallower lakes are, like the rivers, suscep- 
tible to the equalizing influences of summer temperatures, 
but, in the case of Lake Memphremagog, circum- 
stances peculiar to itself, affect the conditions of heat 
and cold in its waters. Whilst it is exceptionally high 
above the sea, it is in many places of considerable depth. 
Nearly opposite Owl’s Head, the sounding line, it is claimed, 
has reached the depth of 600 feet, whilst near George- 
ville, six miles further down the lake, there are places 
where I have not found the bottom at 325.feet. The oppo- 
site shores at this point are about two miles apart, and it 
was here, about midway across, that last August the tem- 
peratures were taken. Negretti & Zambra’s deep-sea 
thermometer was used for ascertaining bottom records. 
The following register made on 10th of August at 11 a.m. 
under the conditions of strong sun and cloudless sky, indi- 
cates generally the results: 
Mian SHAG Mase Reet see ene ceeak ie cake 
Water 1” below surface............... 74° 
do Outi seninG Ours. tence cnet: POKES 
do 12 «do OCIS Soe tae Pyylbes 
(loys 40S Sl) CO WRG areata es 48° 
do 54 do Olof Masanonosodeedsce 44.'75° 
