333 



of wire were subjoined beyond it ; and 5 when 550 miles were in- 

 terposed between the battery and galvanometer, the same length, 

 110 miles, being subjoined. In like manner, when 220 miles were 

 added beyond the galvanometer placed near the battery, the indica- 

 tion was 12 ; precisely the same as when 440 miles were interposed 

 and 220 added. So also when 330 miles were added, the deviation 

 of the galvanometer was 18; and 15 when 330 miles were inter- 

 posed and 330 added. I have no doubt that the correspondence 

 would have been closer had it not been for the fluctuations of the 

 battery. 



It would appear from this, that whatever be the length of wire 

 attached to the insulated pole of a battery, it becomes charged to 

 the same degree of tension throughout its entire extent; so that 

 another insulated wire brought into connexion with its free extre- 

 mity exhibits precisely the same phenomena, in kind and measure, 

 as when it is brought into immediate connexion with a pole of the 

 battery. Some important practical consequences flow from this 

 conclusion, which I will not develope at present, as I have not yet 

 had an opportunity of submitting them to the test of experiment. 



April 19, 1855. 



The LORD WROTTESLEY, President, in the Chair. 

 The Right Hon. Lord Hatherton was admitted into the Society. 

 The following communications were read : 



I. t( On the descent of Glaciers." By the Rev. HENRY MOSELEY, 

 M.A., F.R.S., Corresponding Member of the Institute of 

 France. Received March 15, 1855. 



If we conceive two bodies of the same form and dimensions (cubes 

 for instance), and of the same material, to be placed upon a uniform 



