Art. I. 
. On the Magnetical Dip in the United States ; by Prof. Joun 
al 
pS 
XII. 
CONTENTS. 
Second Letter to Prof. Faraday; from Prof. R. Hare, M.D. 
Locke, M. D., 
; (Se on the Metitilaia of Lamarétts by Ss. s. Hare 
DEMAN 
. Short Notices of Anteiotn Fossil Fishes: by W. Cc. hin 
FIELD 
. Contributions to English Lexicography; by Prof. J. W. 
(BBS, 
. Origin of the Names of eests: Birds and Last: by Prof. 
J. W. Gisss, 
. Abstract of the Prtoesitings of the ‘Tenth sicaing of the 
British Association for the Advancement of Science, 
. Remarks relating to the Tornado which visited New Bruns- 
wick, in the State of New Jersey, June 19, 1835, with a 
Plan and Schedule of the Prostrations observed on a sec- 
tion of its track; by W. C. Repriexp, Esq., 
. Notice of a Model of the Western portion of the Scbuylkil 
or Southern Coal-Field of Pennsylvania, in illustration of 
an Address to the Association of American Geologists, 
on the most appropriate modes for representing Geolo- 
gical Phenomena, with a Plate; by Ricuarp C. Tayzor, 
. A Notice of Indian Cyprinide, being the second part of 
the nineteenth volume of Asiatic Researches, by Mr. John 
M’Clelland. Read Feb. 17, 1841, to the Boston Society 
of Natural History ; by D. Humpnreys Srorer, M. D., 
- Des Moulins’ General Considerations on Restricting the 
number of Species of the genera Unio and Anodonta; 
translated from the French, by Paitie H. Nicxury, A. M., 
. Description of an American Spider, constituting a new sub- 
genus, of the tribe Inequitele of Latreille; by Prof. N. 
. Hentz 
Contributions to Houciniey ina Wapvitinen Ne. Iv. On 
Electro-Dynamic Induction; by Prof. Josera Henry, 
Page. 
1 
g 
104 
117 
