832 TRANS. OF THE ACAD. OF SCIENCE. 
temic ore situated about nine miles from Dubuque, in the 
State of Iowa. 
Dr. nets stated that, on the 19th & 20th Feb. last, the 
Thermometer at this poin t had passed through 46° F.in 12 
hours, falling from 76° in athe afternoon to 30° on fg: follow- 
: ; a 
ate, occurring only o very five x years, but in 
two instances he had sautona a sil more vislens fall of spe 
peeaiiite, 52 to 54°, in as short a 
Mx. Wm. Me McAdams, Jr., of Siempre Ill, was elected 8 a 
correspondent. 
‘Samuel Annan, M.D. and O. Blank, M.D., were clectel 
amen: <sgmcotegay 
March '; 1859, 
The Bennie, Dr. A. Wisitkewont in the chair. - oe 
Rad 3 
Jes; Jour. of the Franklin Tnsty, 3 
i the Ti Institute; ay of the Univ. a - 
