4 
CORRESPONDENCE. — 1858. 
September 1th. From the Public Library, Museum and Gallery of Art, Liver- 
pool, dated August 2d, 1858, acknowledging receipt of publications of the Aca- 
demy, and noting deficiencies. 
Uth. From H. C. Sorby, dated Bromfield, Sheffield, July 6th, 1858, and 
August le Jolis, dated Cherburg, August 6th, 1858, acknowledging their elec- 
tion as correspondents. 
Ernest Turati, dated Milan, August 11th, 1858, proposing exchanges. 
2lst. From George Davidson, dated Philadelphia, Sept. 15th, 1858, acknow- 
ledging his election as member. 
October 5th. From the British Museum, dated London, Jan. 7th, 1858 ; 
The Geological Society of London, dated June 10th, 1858 ; 
The Literary and Philosophical Society of Manchester; 
Societe du Museum d'Histoire Naturelle de Strasburg, dated March 1st, 
1858, severally acknowledging receipt of publications of the Academy. 
Lewis Troost, dated Hot Springs, Va., Sept. 22d, 1858, offering for sale the 
collection of minerals and fossils of the late Gerard Troost. 
I2th. From the Zoolog. Botan. Gesellschaft of Vienna, dated June lOtb, 
1857, transmitting donation. 
J. J. Up de Graff, dated Indianapolis, Oct. 6th, 1858, asking information, and 
proposing exchanges. 
J. M. Kennedy, dated Washington, Oct. 7th, 1858, offering for sale a collection 
of reptiles. 
Idth. From Arthur M. Edwards, dated New York, Oct. 12th, 1858, and John 
H. Janeway, dated Princeton, N. J., Oct. 18th, 1858, acknowledging their elec- 
tion as members. 
mv. 2d. From Daniel Egbert, M. D., U. S. N., dated Philadelphia, Oct. 28tb, 
acknowledging his election as member. 
Baron R. von Osten Sacken, dated Washington, Oct. 30, 1858, and A. Guyot, 
dated Princeton, N. J., Nov. 1st, 1858, acknowledging their election as Corres- 
pondents. 
W. P. Tatham, dated Philadelphia, Oct. 30th, 1858, transmitting donation. 
9th. From Benjamin Peirce, dated Harvard University, Cambridge, Mass., 
Nov. 6th, 1858, acknowledging his election as Correspondent. 
16^A. From the Naturf. Gesellschaft in Freiburg, Oct. 15th, 1858, transmit- 
ting donation. 
23d. From Societe des Sciences physiques et Naturelles, Zurich, dated June 
22d, 1858, transmitting donation, and acknowledging receipt of publications of 
the Academy. 
Wm. Spillman, M. D., dated Columbus, Miss., in relation to a collection of 
fossils from the Ripley group to be transmitted to the Academy. 
Samuel Ashmead, dated Philadelphia, Nov. 23d, 1858, resigning his office as 
Curator, on account of removal from the city. 
0. M. Mitchel, dated Cincinnati, Ohio, Nov. Uth, 1858, acknowledging his 
election as correspondent. 
Dec. 1th. From John M. Dow, dated Panama, Nov. lOtb, 1858, acknowledg- 
ing his election as member. 
Societe Royale des Sciences de Liege, dated June 15th, 1858, and 
Societe Imperiale d'Agriculture, d'Histoire Naturelle et des Arts utiles de 
Lyon, dated August 2d, 1858, transmitting donations and acknowledging receipt 
of publications of the Academy. 
Royal Society of London, dated June 20th, 1858 ; 
Royal Society of Sciences of Upsal, dated Jan. 8th, 1858 ; 
Societe Imperiale des Naturalistes de Moscou, March 3 — 12, 1858 ; 
Naturforschenden Verein zu Riga, Jan. 31st, 1858 ; 
K. L. C. Ak. der Wissenschaften,, Breslau, Nov. 20th, 1857 and June 20tb, 
1858 ; 
Naturhist. Verein der Preass. Rheinl. und Westphaliens, Bonn, Jan. 11, 1858; 
Naturforsch. Gesellschaft in Dantzic, April 8th, 1858 ; 
