480 Canadian Record of Science. 
winter are extremely unpleasant, not to say dangerous, to 
occupants of vehicles. 
Other advantages of the adoption of a scheme for power 
distribution by means of air under pressure might be dis- 
cussed. Enough has been said, however, to warrant the 
assertion that the great technical advances recently made 
in this matter are sufficient to place the pneumatic system | 
in the forefront as a realizable scheme. 
The practical success it has met with in Paris, where 
13,000 horse power are now at work, is an instance on a 
large scale of the possibility of the distribution of power 
by means of compressed air. 
THE WORLD’S GEOLOGICAL CONGRESS. 
By Henry M. Amz, M.A., DSc. 
As an auxiliary of the World’s Columbian Exposition, the 
World’s Geological Congress was held at Chicago during 
the week commencing Monday, the 21st of August, 1893. 
It had Leen thought desirable “ that there should be an 
exposition and comparison of the progress which the vari- 
ous countries have made in the delineation of their geolo- 
gical formations,” and, accordingly, the committee ap- 
pointed by the Congress Auxiliary to prepare a programme 
for the Geological Congress submitted the following themes 
for discussion and consideration : 
I. On geological progress. 
II. On cortinental growth and international relations. 
III. On paleontological and archeological geology. 
IV. On physical, structural and pettontaphica) geology. 
VY. Ou economic geology. 
VI. Miscellaneous, 
There was a fairly good representation of geologists from 
the United States and Canada; but very few Europeans 
were present, a circumstance much to be regretted. Yet 
these latter sent papers, which were read and formed an 
interesting part of the work in the sessions. 
