62 NOTES. 
sphere all that he had expected to find. The occurrence of these 
phenomena on a large scale in the southern hemisphere tended at 
once to establish the fact that the glacial phenomena were cosmic 
phenomena, and were not owing to local geological occurrences. 
He contended that the ability to recognize glacial phenomena de- 
pended in a great measure upon thorough familiarity with it, there 
were so many elements to be taken into account. Yet the track of 
the glacier could be detected as certainly as the hunter detects the 
track of his game. Causes of deception in interpreting the glacial 
phenomena were pointed out in detail. He showed the distinction 
between local glacial phenomena and phenomena belonging to 
general glaciation. The evidence obtained from erratic bowlders 
was examined and apparent contradictions explained. In some 
of the New England regions he had traced the tracks of bowlders 
for seventy miles in unbroken continuity. In the southern hemi- 
sphere he had traced them over a much longer distance. 
He would make a statement which he expected would not be 
accepted for many years; it was that all our mountains below 
eleven thousand feet had all been scored over by the great sea of 
ice ; that the whole range of the Rocky Mountains had been under 
ice, with only a few prominent peaks, perhaps rising above the 
fields of ice. He thought that the great ice sheet could not have 
been less than ten or twelve thousand feet thick and might 
have been thicker.’ In the Andes he had become acquainted with 
signs of glacial action twelve thousand feet above the sea. 
Prof. J. D. Whitney, State Geologist of California, read a paper 
on ‘* Notice of Investigations making in California on the relia- 
= bility of the barometer as a hypsometric instrument.” His remarks 
were MEES by charts and tables. 
_ Prof. Agassiz and Prof. Hilgard followed in remarks commend- 
ihe the geological survey of California as a work of great national 
importance, and hoping that the Academy would use its influence 
_ to prevent its interruption. 
Prof. A. E. Verrill gave an interesting account of results of 
least three hundred and fifty species to the fauna. Among the 
_polypes prior to this investigation there were known but twelve 
: species. They had added seven species. They had added thirty- 
“ee Apoie t to the forty-eight Acalephs ; ten species to the Echin- 
