ir “CONTENTS, = % 
PY Page. 
ODLOGY.- 
Observations on the Pincers of North America, by Samuel 
L. Mitchell, M. D., 
bs sion of ave spout of Ghiton, by D. W. Barnes, 
M.A, 
; se: 69 
MATHEMATICS AND MECHANICS, 
Review oe 4 Treatise of Mechanica, by Olinthus Grego- ; 
L 7 
On ths For orm of. the Teeth of | ‘Cog: Wheels, by Eli W. Blake, ag 
New Algebraic a by Prof, J. Wallace, Coliimabia, S. C. 278 
Second Memoir on Navigable Canals, by M. P. S. Girard, 
(Ann. de Chimie) Translated by. =D Doolittle, - - 286 
On (Crank Motion, by A. B. Qui nby, Se .: 5 
PHYSICS, CHEMISTRY, &e. 
Essay on the Question, whether the > bet Ele rie 
Fluids, or only one, by Robert Ham 
Description of a new Electrical Plate Machine % R. Hie. 
co fe 
ai: mg ie an “improved. Blowpipe by Alcohol, 4 R. 
are, . 
peecaae uM Perkins? _New Steam- Engine, (Bainb. 
ilos. Journal, No. - 111 
cs pn.the Chinese Brilliant Fires, by James Cut ay 
101 Se Dr. olen, (Editor. - 140 
‘s on the - Water- = 6. abiph 141 
by cgi, 326 
plyir new meth- 
