48 National Geographic Magazine. 
to secure accuracy. The greatest depth reached was about one 
mile. An elaborate discussion of the results fixes the increase of 
temperature at 1° F. for each 65 ft. increase of depth. This is 
about 15 ft. greater than the figures that have heretofore been 
given ; a difference so large that we may question if they will be 
generally accepted until verified by further observations made 
with equally great care. 
In conclusion permit me to note the fact that the United States 
was for the first time represented in the International Geodetic 
Association, at the meeting recently held in Paris; and also to 
record the successful conclusion of the fourth International 
Geographical Congress that assembled in Paris in August last. 
The reports from the Congress indicate a wide range of subjects 
discussed, and lead us to believe the interest in our science is 
progressive, and must receive the hearty appreciation of all who 
are inspired by the nobler instincts to develope the great sphere 
on which we live ; that the riches, the beauties, and above all the 
grandeur of Nature, may be made manifest to ourselves and for 
our posterity. 
