170 



Proceedings of the Academy of Natural Sciences of Philadelphia, 

 from Sept. 3 to Oct. 27, 1850. 8vo — From the same. 



Journal of the Franklin Institute. Third Series. Vol. XX. No. 5. 

 Nov. 1850. Philadelphia. 8vo. — From the Institute. 



Delia Mnemotecnia, ovvero del modo di meravigliosamente facilitar 

 la Memoria mediante I'associazione delle idee. Dissertazione del 

 Prof. Taddeo dei Consoni, Mnemonico, Stenografo, Criptografo, 

 &c. &c. Firenze, 1848, 8vo. — From the Author. 



Contributions to the Natural History of the Acalephoe of North Ame- 

 rica. By L. Agassiz. May, 1849. 4to. — From the Author. 



Smithsonian Contributions to Knowledge. The Classification of In- 

 sects from Embryological data. By Prof. Louis Agassiz. Aug. 

 1849. 4to. — From the same. 



The American Journal of Science and Arts. Second Series. No. 

 30. Nov. 1850. With an Index to the first ten volumes. New 

 Haven. 8vo. — From Profs. Silliman and Dana, Editors. 



Code of Rules and Regulations for the government of those employed 

 in the care of the Patients of the Pennsylvania Hospital for the 

 Insane, near Philadelphia. Second Edition. Philadelphia, 1850. 

 8vo. — From the Author, Dr. Thomas S. Kirhhride. 



Observations on the Fishes of Nova Scotia and Labrador, with De- 

 scriptions of New Species. By Horatio Robinson Storer. (From 

 the Boston Journal of Natural History, Oct. 1850). 8vo. — From 

 Charles Girard. 



The Plough, the Loom and the Anvil. Vol. III. No. 6. Dec. 1850. 

 Philadelphia. 8vo. — From the Editor, J. S. Sldnner, Esq. 



The Medical News and Library. Vol. VIII. No. 96. Dec. 1850. 

 Philadelphia. Svo. — From Messrs. Lea <^ Blanchard. 



Mr. Justice submitted for the inspection of such of the mem- 

 bers as are interested in numismatics, a specimen of the rare 

 coin known as the Washington Half-dollar. 



The history of this coin is not exactly known, but tradition states 

 that a ^Gw were struck and submitted to the government as samples, 

 when the project for establishing a mint was first entertained. Orders 

 vi^ere immediately issued for the cessation of the issue, and for break- 

 ing the dies. The coin bears the effigy of Washington, with the 

 legend, " G. Washington. President I. 1792." On the reverse, an 

 eagle with spread wings, bearing the shield of the United States, with 

 the olive branch and arrows, its head surrounded by the 13 stars, 

 and the legend, "United States of America." 



