magnetism on chemical action ; the latter, with the theory of 

 electro-deposition, which supposes the coating to be formed 

 on the plate and not deposited, strictly speaking, thereon. 



The President exhibited a slip of paper which he had received 

 from Professor Thomson. On the paper was printed by 

 photography the line indicating the various changes of atmo- 

 spheric electricity, which took place at the observatory of Kew 

 during twelve successive hours. Much interest was excited 

 by witnessing one of the first fruits of Professor Thomson's 

 beautiful instrument. The paper indicated a series of very 

 rapid oscillations, about one per minute, of the intensity of 

 atmospheric electrical force. 



Mr. Henry Bowman presented the following statement 

 of observations on the temperature of the six summer months 

 ending September 30th, 1860, taken by a self-registering 

 thermometer at Victoria Park, Manchester : — 



