el 
- 
The next No. of this Journal will be published on the first of March. 
CONTENTS. 
Pag 
Art. I. Experiments'on the Electricity of a Plate of Zinc buried 
in the Earth ; by Prof. Exias — ee te 1 
IL. Geology of Canada, fee ae 
TIL Ash Analyses ; By Jno. A. Posie: - 20 
IV. A Product of the action of Nitric Acid on Woody “Fibre; - 
by Jno. A. Porter, . 20 
_V. On the Navicula Spencerii ; by Wanass De LA Res, ee 
VL Caricography ; by Prof. C. Dew 29 
Vit. — rot of Iron and some a Nit itrates ; by er M. 
VIL. ay dacciption of ise sdditional Seattle of the Engé: per 
(Troglodytes ae Daves) from _— — by 
Jerrries Wyman, 
IX. Notice of the cranium of the Ne. Be @ new species é 
_ Manatee (Manatus nasutus) from W. Africa ; by JEFFRIES 
Wyman, M.D., — - : ae 
os On Denudation i in the Pacific ; by aes D. Duss, oe 
ie! marks on the ‘Canesten of Leucine, with hiead steers 
tions upon the late Researches of M. Wutz; by T. S. Hunt, 68 
XI. On Perfect Musical Intonation, and the fcadgiiantal Laws 
of Music on which it depends, with remarks showing the 
"practicability of attaining this Perfect Intonation i in the Or- 
gan; by Henry Warp Poors,  - oe 
XIII. Analyses of several Minerals; by Wiss Pinion 
XIV. Memorials of John Bartram and Humphry Marshall, ith 
notices of their Botanical paint cater ud Ww. Di AR a 
LINGTON, M.D., LL.D., - ree. 
XV. Vibrations of oa s bry by the Galvanic: ‘ur 
by Prof. Cuas. G. Pag ee ee 10 
‘VI. On four new species = Hemiptera of ihe sens Pier 
 Chermes, and Aleurodes, and two new HRA 0 
_‘Sitic in | the last named cam by S. S. es 
scanners nin fn ete nhineh 
“SCIENTIFIC INTELLIGENCE. 
