CONTENTS. 
of Plants, 227.—Filariz in the Blood ofa living Dog: Experi- 
ments of Karsten, relative to the formation of the ‘ images 
of Moser,”’ 228.—Great Comet of 1843, 229.—Second Comet 
of 1843: Meteoric Observations of April 20, 1843, 230.— 
Hundredth Anniversary of the American Philosophical Soci- 
ety, 231. 
NUMBER II. 
Art. I. On a New Form of Mountain or other Barometer; by 
J. H. Avexanver, Esq.—(with a plate,) - - - 
Il. Notice of ‘* Molluskite,” or the fossilized remains of the 
soft parts of Mollusca; by Gip—on ALGERNON Man- 
Reniesd.. Lis. DF. R.S.; G.S., we!) - - 
III. An effort to refute the arguments advanced in favor of 
the Existence in the Amphide Salts, of Radicals con- 
sisting, like Cyanogen, of more than one element ; by 
Prof. Ropert Hare, M.D., — - - - - - 
IV. A New Instrument for estimating the quantity of Car- 
bonate of Lime present in Caleareous Substances; by 
J. Lawrence Suita, M.D.,~ - - - - - 
V. On the Method of Drs. Varrentrapp and Will for estima- 
ting the Nitrogen in Organic Compounds; by J. Law- 
RENCE Situ, M. D., - - - - - - 
VI. Remarks on the First Principles of the Differential Cal- 
culus, together with a new investigation of Taylor’s 
Theorem; by Prof. THEopoRE Strone, - - - 
VII. Notice of a portion of Dr. Dekay’s Report on the Fishes 
of New York; by D. Humpureys Storer, M.D.,_ - 
VIII. On Greek Verbal Roots in English; by Prof. J. W. 
GIBBS, - i) a - = < - - - 
IX. Remarks on Tides and the Prevailing Currents of the 
Ocean and Atmosphere ; by W. C. REDFIELD, - - 
X. Abstract of the Proceedings of the Fourth Session of the 
Association of American Geologists and Naturalists, 
XI. On the upright Fossil Trees found at different levels 
in the Coal Strata of Cumberland, Nova Scotia; by 
Cuares Lyett, Esq., F.G.8., F.R.S., &e., - - 
XII. On the Coal Formation of Nova Scotia, and on the Age 
and Relative Position of the Gypsum and accompany- 
ing Marine Limestones ; by C. Lett, Esq., F. G.S., &c. 
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