232 TRANS. OF THE ACAD. OP SCIENCE. 



Augvst 17, 1803. 

 The President, Dr. Encelmann, in the chair. 



Five members present. 



Letters were read from Dr. W. A. Gordon, Louisville, Ky., 

 Aug. 5, 1863, ordering a copy of the Trans.; the Royal So- 

 ciety of Sciences, Gottingen, May 7, 1*63 ; Naturf. Gesell- 

 schaft, Altenburg, March 19, 1x63; Societe des Sciences Na- 

 turelles de Neuchatel, Dec. 31, 1862; the Overyssel Society 

 of Sciences, Zwolle, Mar. 17, 1863 ; Naturk. Gesellschaft der 

 Wissensch., Prag, Mar. 28, 1863 ; Naturf. Gesellschaft, Halle, 

 March 10, 1863; Smithsonian Institution, August, 1863, — an- 

 nouncing publications sent, and acknowledging receipt of 

 Transactions; and from the Smithsonian Institution, Aug. 8, 

 1863, sending a donation of Amer. Tertiary and Cretaceous 

 shells for the museum of the Academy. 



The following publications were received : 



Overysselsche Vereenigung tot Ontwik. van Prov. Welvaart: Jaar- 

 lijksch Verslag ; Register van Charters en Bescheiden van Kampen, 1863, 

 Zwolle— from the Society. Konigl. Gesellschaft der Wissensehaften: Nach- 

 richten, No. 1-27, Gottingen, 1862— from the Society. Mittheilungen aus 

 clem (Jsterlande, Band XVI., Heft 1, 1862, Altenburg— from the Society. 

 Socie'te' geologique de France: Bulletin, T. XX., Feuilles 6-12, 1862-3, 

 Paris— from the Society. Socie'te' des Sciences Naturelles: Bulletin, T. VI., 

 cah. 1, 1862, Neuchatel— ; from the Society. Wiirzburger Med. Zeitschrift, 

 Band IV., Heft 2, 1863— -from the Society. Royal Hungarian Academy of 

 Sciences: Kozlonye, 1862, Pesth— from the Academy. Naturk. Gesellschaft: 

 Jahresbericht XII., Hanover, 1863— from the Society. K. Bohmische Ge- 

 sellschaft der Wissenschaften: Abhandl. 1863, 4to ; Sitzungsberichte, 

 1862, Prag— -from the Society. Naturf. Gesellschaft zu Halle: Abhandl., 

 Band XVII., Heft 2, 1862— from the Society. Proc. Royal Horticultural 

 Society, Vol. III., No. 5, May, 1863, London— -from the Society. On Cali- 

 fornian Mosses, by Leo Lesquereux, 1863— from the Author. 



The Corresponding Secretary presented as a donation from 

 the Smithsonian Institution a collection of Amer. Tertiary 

 and Cretaceous shells, labelled as per catalogue of the Insti- 

 tution. 



Dr. Hart presented a specimen of copper ore from Portage 

 Lake, consisting of quartz, dog-tooth spar, and native copper. 



Dr. Engelmann made some remarks upon the comparative 

 mean temperature of the month of July, at St. Louis. The 

 warmest July experienced here within thirty years past was 

 in 18^6, when the mean temperature was 83.5° Fahr. ; the 

 coldest occurred in 1848, with 73.7°. The mean temperature 

 of this last month was 76°, the minimum 55°, and the maxi- 

 mum 94°. In 1860, the maximum reached, in the afternoon 

 of the 21st, 104°, and in 1856, at noon on the 17th, 102.5°; 

 in nine years, of the thirty observed, it rose over ll)0°. The 

 lowest temperature noticed in July (53°) occurred on the 



