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ROYAL SOCIETY OF CANADA 



In September the same thermometers were placed in the same holes, 

 with the results as follows : 



Thursday, Sept. 3rd 7 a.m. 



12 m. 



6 p.m. 



Friday, Sept. 4th 7 a.m. 



12 m. 



" " 6 p.m. 



Saturday, Sept. 5th 7 a.m. 



From these figures it is very evident that the interior of the bog was 

 slowl}' warmed up during the summer, rising in two months an average 

 of 2° at one foot under the surface, and 5° at three feet beneath the surface.' 



1 In July 23rd to 31st, 1897, (a ye ir later), I made another set of measurements 

 with the same thermometers, in the same holes. I need not here give the particu- 

 lars, but the general results are as follows : air over bog, 11 to 24 ; at one foot, 12f 

 to 14°, average, 13J" ; at three feet, 7° to 8|°, average, 7^. One would from the dates 

 expect these figures for 1 and 3 feet to be intermediate between those of early July 

 and September, 1890. As a matter of fact, while this is true for three feet, it is not 

 for one foot, for in this the average for late July, 1897, is higher tlian for September, 

 1897. ProVjably this is accounted for by the heavy rains in 1897, for I liave noticed 

 •that the bog warms slightly near the surface after a rain. 



