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CONTENTS OF VOLUME XXII. 
NUMBER I. 
Page 
Prof. Hrrcucocx’s Report to the eae ‘of Massa- 
chusetts on the Geology of that Stat - 
On the Hessian Fly; by Dr. Joseru “ ‘Mose, = - 
Mathematical Papers; by Exizur Waricur, Esq. - 
Description of the American Wild Swan, proving it to 
a new a aa oe Americanos; = Joun T. 
Suarpress, M. D. 
On the analogy which exists hetwedo the Marl of New 
Jersey, &c. and the Chalk formation of oe ad S. 
G. Morron, M. D., 
: gre of an instrument eatiea: the Steady » Pyrome 
rof. Watrer R. Jounson, 
On pure ee Ether; by Samven Goris 
Steam Boats protected fiom the Effects of Lightoing by 
Avexanper Jones, M. D., ~ 
. Abstract of Meteorological Observations for 1831, eandé 
at Marietta, Ohio; by Dr. 8. P. Hiry 
Further Experiments on the Disinfectiog Foukis of In- 
creased hag Seo si WinuraM a M. D. 
F.R.S., &c. 
- Remarks upon the “Natoral Ressiness of the Witton 
ntry, 
- On the Artificial Pcccumsion of il Medicinal Wein, 
by Wittram Meape, M.D., - 
- On Central Forces; by Prof. Tanners Sens ; 
. Experiments on the Expansion and Seatrantion ‘of Build- 
ing Stones, by variations ti apse: 3 communica- 
ted by W. H.C. Barri - 
- On two new acid compos “of Chlorine, Carbon, and 
Hydrogen; by Aue s A. Hayes, - 
- On a disturbance ike, Earth's *s pte se in connexion 
with the appearance of an Aurora Borealis, as observed 
at Albany, April 19, 1831; by Josern Henny, - 
