347 



Herrn Geheimen Rath Bessel. Von C. Riimker. Hamburg, 

 1847. 4to. — From Professor Riimker. 



Agricultural Botany : An Enumeration and Description of Useful 

 Plants and Weeds, which merit the notice or require the atten- 

 tion of American Agriculturists. By William Darlington, M. D. 

 Philadelphia, 1847. 12mo — Fro7n the Author. 



A Brief Notice of the Life, Researches and Discoveries of Friedrick 

 Wilhelm Bessel. By Sir J. F. W. Herschel. 



ADDITIONS TO THK XIBRARY BY PURCHASE. 



Scientific Memoirs. Edited by Richard Taylor, F. S. A. Vol. V. 



Part XVII. May, 1847. 8vo. 

 The London, Edinburgh, and Dublin Philosophical Magazine. Vol. 



XXX. Nos. 203, 204 and 205. June and July, 1847. 8vo. 

 Astronomische Nachrichten. Nos. 597 to 603, inclusive. 4to. 

 The Edinburgh New Philosophical Journal. Conducted by Professor 



Jameson. No. 85. April to July, 1847. 8vo. 



A communication from Mr. Richard A. Tilghman, on the 

 Decomposing Power of Water at high temperatures, was read 

 and referred to a Committee, consisting of Prof. Frazer, Dr. 

 Bache and Dr. Patterson. 



A communication was read from Professor Riimker, con- 

 taining his latest observations on the planet Astrsea, and also 

 his observations on the Comet lately seen. 



My dear Sir, — I take the liberty of sending you herewith the 

 second part of my treatise on occultations of fixed stars, with a few 

 copies for distribution. 



I take the opportunity of communicating to you my latest observa- 

 tions of the planet Astrsea. 



