TRANSACTIONS OP THE SECTIONS. 



29 



iug to forty cubic feet per minute, also stops, or rather becomes negative, 

 for the water recedes in the shaft even when the pumps commonly used 

 to extract the brine do not work, and the water subsides during fifteen 

 or twenty minutes. It then Hows again, the water appearing first and 

 suddenly, the gas gradually increasing in quantity, till, after three quar- 

 ters of an hour, the shaft is full as at first. The state of greatest dis- 

 charge continues with little variation for three or four hours, but by no 

 means with absolute regularity. It is also affected by various circum- 

 stances, apparently extraneous ; this has gone on with little variation 

 since the bore was made in 1822. Within a short distance is a bore 554 

 Bavarian feet deep, which exhibits somewhat similar phenomena. Alto- 

 gether, Prof. Forbes considers that the salt spring at Kissingen is the 

 most singular phenomenon of its kind in Europe except the Geysers, 



On the Climate of North America. By Dr. Daubeny, Professor of 

 Chemistry and Botany, Oxford. 



The principal object of this communication was to invite the atten- 

 tion of meteorologists to the present state of our knowledge with 

 respect to the climate of the North American continent. With this 

 view the professor laid before the Section the following general table 

 which comprehends all the observations on this subject that he had been 

 able to collect during his late visit to the United States and Canada. 



The best observations made in Canada are those of Mr. M'Cord of 

 Montreal, who has procured from England excellent instruments, and 

 has spared no pains in arriving at accurate results. 



From his statement, it would seem as if there had been a sensible 

 deterioration in the climate of that part of Canada since 1830, for the 



mean of that year was 47"8 



of 1831 46-8 



1832 44-7 



1833 44-8 



1834 45-0 



1835 42-9 



1836 40-43 



1837 41-22 



And a tendency in the same direction may perhaps be detected in the 

 observations recorded at Fort Diamond, above Quebec. 



Temp. 



For in 1830 41-00 Fahr. 



1831 39-00 



1832 35-50 



1833 36-91 



1834 36-87 



1835 33-41 



1836 35-82 



