116 



An Elementary Treatise on the Tides. By J. W. Lubbock, Esq. 

 Treas. R. S. etc. London, 1839. — From the Author. 



Note sur lesEtoiles Filantes du 12 Novembre, 1838, par M. A. Que- 

 telet. Brussels, 1839. — From the Author. 



Note sur les Tableaux Meteorologiques pour l'Annee 1838, a Bruxel- 

 les, par M. A. Quetelet. Brussels. — From the same. 



Experimental Researches in Electricity. By Michael Faraday, 

 D. C. L. &c. Fifteenth series, and Index to series I. to XIV. in- 

 clusive. London, 1839. — Frojn the Author. 



An Inquiry into the Nature of the Numerical Contractions, found in a 

 passage on the Abacus, in some MSS. of the Geometry of Anicius 

 Manlius Torquatus Severinus Boetius, and Notes on Early Calen- 

 dars. By James O. Halliwell, Esq. London, 1839. — From the 

 Author. 



Tracts on Docks and Commerce, with an Introduction, Memoir, and 

 Miscellaneous Pieces. By William Vaughan, Esq. F. R. S. Lon- 

 don, 1839. — From the Author. 



Narrative of a Journey across the Rocky Mountains to the Columbia 

 River. By John R. Townsend. Philadelphia, 1839. — From the 

 Author. 



The American Journal of Science and the Arts. Conducted by Ben- 

 jamin Silliman, M. D., LL. D., aided by Benjamin Silliman, Jr., 

 A.B. Vol. XXVII. No. 1. New Haven, 1839.— From the 

 Conductors. 



Professor Bache, on behalf of the Committee appointed on 

 the paper of Professor Elias Loomis, of Western Reserve Col- 

 lege, Ohio, entitled " Observations to determine the Magnetic 

 Dip at various places in Ohio and Michigan/' reported in 

 favour of publication, and the Report was adopted. 



The observations recorded in this paper were made with a dipping 

 needle by Gambey. The results are contained in the following table. 



Place. 



Laiitude. 



Longitude. 



Date. 



Magnetic Dip. 



Hudson, Ohio, . . . 



410 



15' N. 



81° 



24' W. 



September, 1838. 



72° 



48' .2 



Do. ... 



?> 



» 



>> 



!J 



April, May, 1839. 



72 



46.8 



Cleveland, Ohio, . . 



43 



30 



81 



51 



May, „ 



73 



26.0 



Detroit, Michigan, 



42 



19 



83 



03 



)! » 



73 



42.6 



Ann Arbor, „ 



42 



18 



83 



45 



5) ;> 



73 



13.9 



Ypsilanti, ,, 



42 



14 



83 



38 



j> ?; 



73 



18.0 



Monroe, „ 



41 



55 



83 



28 



?? ?? 



73 



32.3 



Toledo, Ohio, . . . 



41 



41 



83 



33 



J? ?; 



73 



06.1 



Maumee City, Ohio, . 



41 



34 



83 



38 



)> )! 



72 



49.1 



Sandusky, „ 



41 



29 



82 



48 



)> >i 



72 



57.8 



