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PHYSICAL AND MATHEMATICAL SECTIOl^. 

 October 10th, 1861. 



G. V. Vernon, Esq., F.R.A.S., was elected a Member of 

 the Section. 



A letter from Mr. Heelis, F.E.A.S., having been read, 

 resigning the Secretaryship of the Section on account of the 

 state of his health, it was resolved unanimously, — That the 

 Section receive with regret the resignation, by Mr. Heelis, of 

 his office as Secretary, and sincerely hope that his health 

 may soon allow of his resumption of official connection with 

 them. 



Mr. Vernon, F.R.A.S., read a Paper, "On the Irregular 

 Barometric Oscillations at Geneva and on Great St. Bernard, 

 and their Relations to Mean Temperature and the Fall of 

 Rain." [This Paper was afterwards read at the Ordinary 

 Meeting of the Society, held on October 15th, 1861. See 

 Proceedings No. 2, Session 1861-S.] 



November 7th, 1861. 



Professor Clifton, B.A., F.R.A.S., was elected Secretary of 

 the Section, in place of Mr. Heelis, resigned. 



A letter from Mr. Heelis, F.R.A.S., was read, commu- 

 nicating the following observation of the Zodiacal Light, 

 recently made by him at Smyrna. " September 13th, 1861, 

 4h. a.m. Observed the Zodiacal light very distinctly ; the 

 breadth of it was not observed, but the position of the apex 

 was ascertained, as carefully as an eye unaccustomed to such 

 observations would permit, to be in a line and about midway 

 between Pollux and Procyon. This would give an approxi- 

 mate length of 75° 11'. The cluster Pra^sepe was seen 

 (iistinctly through the light shiniiig like a white cloud, and 



