ACADEMY OF SCIENCES. 175 
the head of Johnson’s Pass. I regret that, owing to an accident to my moun- 
tain barometer, I was unable to obtain exact hypsometrical measurements. 
Notre.—Since this paper was written, I have read Mr. Croll’s work, Climate and Time, 
of which a large part is occupied in attempting to prove that during the glacial epoch the 
summers must have been colder than at present. As the grounds on which his argument 
is founded are more or less hypothetical, and his conclusions are, I think, inconsistent 
with the slight horizontal extension of the ancient glaciers, not only in the Sierras, but, 
as I have shown, also in the Puebla mountains, I must conclude that at least in this part 
of the earth’s surface the glacial epoch was marked by cold winters with very heavy snow- 
fall, and hot summers. The glacier coming from the south end of the Puebla range offers 
even a more marked example of slight horizontal extension than that at the head of the 
American Valley. This glacier had its origin in a valley six miles long and a mile broad, 
surrounded by peaks from 6,000 to 7,500 feet high, and which still retain snow on them 
during the whole year. At the height of the glacial epoch, this valley must have been 
filled by a vast glacier which escaped into the Puebla Valley, the latter valley being at 
an elevation of 4,600 feet above the sea; and yet under these circumstances the terminal 
moraine does not extend more than a mile and a quarter into the valley, although at its 
head, or near the foot of the mountain, it has probably a thickness of three hundred feet, 
Mr. Lockington presented a communication drawing the at- 
tention of the Academy to the unhealthy condition of the build- 
ing, suggesting remedies therefor, and that a committee be ap- 
pointed to collect funds to improve the premises. 
SrrciaL Meretine, SepremBer 28, 1875. 
Vice-President Edwards in the Chair. 
Thirty-five members present. 
By request of Mr. Edwards, General Colton, President of 
Board of Trustees, explained the object of the Special Meeting. 
He stated that the Board of Trustees had held a special meeting, 
at which Messrs. Felton and Hittel, Attorneys for Mr. Lick, 
were present. At this meeting Mr. Felton had read such parts 
of Mr. Lick’s new deed, dated September 21, 1875, as were 
changed from the deeds of July 16, 1874, and September 16, 
1875. The Trustees had informally agreed to the changes made 
by Mr. Lick. At the same meeting a deed was read, dated Sep- 
tember 21, 1875, giving to the Academy, without any restrictions 
whatever, the property on Market Street, formerly deeded by 
