278 
Mr. W. H. Leceerr exhibited an Ear of Indian Corn, of 
monstrous character, from Chester Co., Pa. It appeared to 
be made up of four ears united together. 
Pror. O. W. Morris exhibited a Stem of Amaranthus, 
distorted in a curious manner, so as to be bent at several 
right angles. 
Pror. B. N. Martin exhibited aseries of Minerals from the 
Geysers of California. 
Pror. A. M. Epwarps exhibited specimens of Distinctly 
Stratified Rock, from beneath the Trap, back of Hoboken, N. 
J., which was recognized as one of the rocks mentioned by 
Prof. Wurtz, and called by him, Trappoid Schist. 
Pror. H. Wurtz exhibited specimens of Iron Ochres, from 
Mt. Katahdin, Me, and made some remarks on their 
probable mode of formation. They occur in a bed three to 
four feet thick, and contain casts of leaves looking like those 
of the Birch. Analysis shows that there are two varieties, 
but that they both consist essentially of Ferric Hydrate with 
water, and a little mineral charcoal, besides traces of Pyrites, 
Silica and Humic acid. 
The following paper was read. 
Notes on Meteorology for August and September, 1871, with 
Remarks on the Spring and Summer of the same year. 
By Pror. O. W. Morris. 
August commenced with the Barometer at 29°863 inches; 
it rose for two days, and then fell and was variable during 
the month; the maximum, 80°288 in. occurred on the 23d, 
and the minimum, 29509 in. on the 30th, a difference of *719 
inch. The mean for the month, was 29°855 inches. 
The temperature on the Ist, was 67°7°, and kept above that 
till the 19th, when it fell to 66°. The maximum occurred 
on the 27th, 86°, the minimum, 65° on the 81st, a range of 
21°. The monthly mean was 75°23°. There were six 
