JOURNAL OF PROCEEDINGS. 707 
Dr. Engelmann stated that Dr. Wislizenus had provided 
himself with Dellmann’s apparatus for measuring atmospher- 
ic electricity, the most delicate and complete one ever con- 
structed; and that he had entered upon a course of regular 
observations, about which he proposed in due time to report 
to the Academy. ‘The only other apparatus of the kind in 
the United States has been lately imported by the Smithso- 
nian Institution. 
r. Engelmann further reported the results of his metero- 
logical observations during the month of June. 
Its mean temperature reached 76.2 deg., two degrees more than the 
The quantity of rain amounted to’ 6.58 inches, a little over the average 
for June—quite sufficient, in a great measure, to redeem the crops, which 
most noted ones were those of the afternoon of May 2Ist at Cincinnati, of 
the morning of May 27th at Louisville, and especially that of the evening 
erienced in St. Louis, during this 
I * 
i i fay 26th (perhaps identical with the 
period, occurred on the evening of M fi Si ghour 20 : wore 
tions, is rarely much influenced by these ogee ee not seem 
to i . i rm of June 
predict them at all; during ee Sale sn 
. . 
storm changes to a (sometimes quite sudden) rise; commonly tus rise 
: i f the thermom- 
continues for some days afterwards, accompanied by @ fall o 
eter, westerly and north-westerly winds, and a clear and dry atmosphere. 
ee 
July 16, 1860. 
Vice-President ENGELMANN in the chair. 
the 
de la Soe. Imp. zoolog. @ Acclimatation, 
the Society ; N. O. Med. & Surg. Jour. July, 
tors; Jour. Frank. Inst., 
