436 Lord Kelvin and Messrs. Maclean and Gait. [Mar. 21, 



March 21, 1895. 



Sir JOHN EVANS, K.C.B., D.C.L., LL.D., Vice-President and 

 Treasurer, in the Chair. 



A List of the Presents received was laid on the table, and thanks 

 ordered for them. 



The following Papers were read : 



I. " On the Diselectrificatibn of Air." By LORD KELVIN, P.R.S., 

 MAGNUS MACLEAN, M.A., F.R.S.E., and ALEXANDER GALT, 

 B.Sc., F.R.S.E. Received March 14, 1895. 



1 . The experiment described in 14 of our paper on the " Elec- 

 trification of Air and other Grases by bubbling through Water and 

 other Liquids" (' Roy. Soc. Proc.,' February 21, 1895), proves that 

 air, electrified negatively by bubbling through water and caused to 

 pass through a metallic wire gauze strainer, gives up some, but not a 

 large proportion, of its electricity to the metal. We have now made 

 a fresh experimental arrangement for the purpose of investigating 

 diselectrification of air which has been electrified, whether positively 

 or negatively, by other means than bubbling through water : with 

 apparatus represented in figs. 1 and 2, which is simplified from that 

 of our former paper by the omission of the apparatus for electrifica- 



