205 
giving a range of ‘893 inch. The mean on the 81st, was 
29°827 inches, ‘03 inch lower than on the 1st. The monthly 
mean was 29-888 inches. 
A beautiful Lunar Corona was observed on the 2d. Lunar 
haloes, on the 5th and 29th. Solar haloes, on the 11th, 20th 
and 26th. Snow onthe 4th, 14th and 26th. Thunder on the 
12th, during a long rain; and a brilliant Meteor in the 
morning of the 25th. Rain fell to the depth of 5:6 inches, 
which was ‘94 inch more than the average for March in 10 
years before. On March 3d, 1861, the mean temperature 
was 8°7° higher than in March 3d, 1871. In 1868 it was 6:26’. 
April 10th, 1871. 
The President in the chair, Thirteen persons present. 
The following paper was read. 
Notes on some Microscopie Organisms. 
By Pror. A. M. Epwarps. 
On the morning of the seventeenth of April, 1869, I col- 
lected in the water of a spring at Weehawken, New Jersey, 
some fine filaments of an Alga, which, upon taking home, I, 
as is always my custom, at once examined by means of my 
microscope. What I then saw interested me so much, that I 
spent all the rest of that day and the most of the two succeed - 
ing days in studying it. The nineteenth happened to be the 
day of meeting of the Lyceum of Natural History, and I then 
took the opportunity of communicating what I had seen ; 
illustrating my remarks by means of carefully made drawings 
and diagrams. The interest shown in my communication 
proved to me that my observation was of importance. But, 
unfortunately, at that time the Lyceum did not publish its 
PROG. LYC, NAT. HIST. N, Y.— VOL. L 14 
