155 



The Annual Report of the Board of Directors of the Pennsylvania 

 Institution for the Deaf and Dumb, for 1844. Philadelphia, 1845. 

 8vo. — From the Directors. 



A Report to the Navy Department of the United States, on American 

 Coals applicable to Steam Navigation, and to other purposes. By 

 Walter R. Johnson. 8vo. — From the Navy Department. 



Reports of the Majority and Minority of the Committee on Internal 

 Improvements, relative to granting the Baltimore and Ohio Rail- 

 road the right of way through Pennsylvania. Harrisburg, 1845. 

 8vo. — From C. B. Trego, Esq. 



Vues et Coupes du Cap de la Heve; Plan du littoral du Cap de la 

 Heve, etc. etc. A lithographic view of the Cape near Havre, 

 in France. By C. Lesueur. — From the Author. 



ADDITIONS TO THE MBRAEY BY PURCHASE. 



Comptes Rendus Hebdomadaires des Seances de I'Academie des 



Sciences. Tome XIX. Nos. 22 to 27, inclusive. 4to. 

 Astronomische Nachrichten. No. 526. 4to. 



Dr. Hays v\^as excused from the duty of preparing an obitu- 

 ary notice of Mr. Keating. 



Dr. Patterson adverted again to the subject of grains of gold, 

 and read from the Annales de Chimie, the account of the grain 

 referred to by Professor Frazer at the last meeting. It weighed 

 23,159 dwts. Its fineness was not given, but its probable value 

 was over 23,000 dollars. 



Dr. Patterson then drew attention to a comparison between 

 the value of the French standard kilogramme and our own 

 weights, as deduced from the various weighings of French 

 gold at the Mint — which comparison, he remarked, although 

 not as accurate as those made for scientific purposes, was still 

 sufficiently so to give to it interest and commercial import- 

 ance. 



On 14th May, 1836, an invoice of French indemnity gold was re- 

 ceived at the Mint, consisting (besides coins) of 28 bars. 



The weight staled by the French Mint was 296.1607 kilogrammes. 

 At our Mint, weighing to the nearest dwt. the weight found was 

 793.5 lbs. Hence the weight of the kilogramme is deduced 

 2.6792767 lbs., or 15432.63379 grains. In weighing gold and 

 silver the pound Troy is alone used. 



