o2 PROF. E. HULL, ON GENEVA AND CHAMOUNIX 



been going on for several centuries. Numerous writers have 

 testified to the remarkable desiccation which has been going on 

 of late in Central Asia, yet it appears from historic records that 

 there were times when the reverse was the case. Nevertheless, on 

 the whole, it does seem that a dry period has set in throughout 

 these regions, and this has affected the glaciers in the Himalayas to 

 a certain extent. The Geological Survey of India has lately been 

 engaged in a preliminary survey, and it has been found that, while 

 the glaciers of the Karakorum ranges give somewhat varying results, 

 those of the Ganges basin in Kumade show very decided signs of 

 shrinkage. If we are inclined, as regards Switzerland, to speculate 

 on the causes which produce this apparent rise and fall the question 

 becomes one of meteorology. We may believe there has been 

 a deficient rainfall in the Alps during the last sixty years, or, 

 secondly, that there has been a slight increase in temperature, 

 especially in summer. It is for the meteorologists of Geneva and 

 elsewhere to help us to solve this problem. 



Some notes contributed by Professor Roget of Geneva were then 

 read by the Secretary : these notes are printed at the end of the 

 discussion. 



Professor Orchard remarked that probably many present had 

 little idea when they came to the meeting how very interesting the 

 subject of geology can be made when treated in the wa}^ in which it 

 had been treated that afternoon. In this connection the name of 

 W. H. Hudleston should be coupled with that of Professor Hull in 

 their vote of thanks. 



After the discussion a series of lantern slides was exhibited, in 

 illustration of the paper. 



The meeting terminated with votes of thanks to Professor Hull, 

 the reader of the paper and to the Chairman, General J. G. 

 Halliday. 



NOTES ON THE PAPEIi BY PROFESSOR ROGET OF 



GENEVA. 



Page 17. It is very difficult to connect with any particular name 

 the first correct notions or experiments upon the motion of glacier 

 ice. At the village of Bagnes or Chables, in canton Valars, may be 

 seen a memorial tal)let claiming for one Perraudin the oriijinaHty of 



