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Ordinary Meeting, October 15th, 1861. 

 Dr. J. P. Joule, President, in the Chair. 

 Mr. John Whalley was elected an ordinary member. 



A Paper was read by G. V. Vernon, Esq., F.R.A.S., 

 M.B.M.S., "On the Irregular Barometric Oscillations at 

 Geneva and on the Great St. Bernard, and their Relations 

 to the Mean Temperature and the Fall of Rain." 



The object of this Paper was to deduce the effects produced 

 upon the irregular oscillations of the barometer by considerable 

 difference of elevation. The station at Geneva is the observa- 

 tory under Professor Plantamour, and is 1,335 feet above the 

 sea. The station on the St. Bernard is the Hospice, and the 

 observations made there are also under the direction of 

 Professor Plantamour; its height is 8,173 feet above the sea, 

 and, consequently, 6,838 feet above the Geneva station. 



The maximum amount of oscillation occurs at Geneva in 

 January, and the minimum in August. The maximum at 

 the St. Bernard occurs in December, and there appears to be 

 two minima, one in June and the other in August. 



Upon the whole, the amount of oscillation appears to 

 diminish as the mean temperature increases, the minimum 

 amount of oscillation occurring somewhat later than the 

 maximum temperature. 



The maximum number of oscillations occurs at Geneva in 

 August ; and there appear to be two minima, one in February 

 Proceedings— Lit. & Phil. Society— No. 2.— Session, 1861-62. 



