ONTENTS OF VOL. XXXI. 



NUMBER I. 



Page. 

 Art. I. Miscellaneous observations, made during a tour in May, 



1835, to the Falls of the Cuyahoga, near Lake Erie, 1 



IL Notice of the Auroi-a Borealis of April 22, - - 85 



III. On Definitions ; by Rev. D. Wilkie, - - - 88 



IV. Chemical Analyses of Mineral Waters from the Azores ; 



by Charles T. Jackson, M. D. - - - 94 



V. Chemical Analysis of Water from the Azores. Water 



called Aqua Azeda ; by Charles T. Jackson, M. D. 96 

 VI. Notice sur la Vie etles Ouvrages deM. leComte Lagrange, 97 

 VII. On the Resistance of Fluids, in reply to Mr. Blake ; by 



Prof. Geo. W. Keely, Ill 



VIII. On the Gales and Hurricanes of the Western Atlantic ; 



by W. C Redfield, Esq. ----- 115 

 IX. Rejoinder of Prof. Shepard to Prof. Del Rio, - 131 



X. M. Alexandre Brongniart's New Work on the History 



•of the Art of Pottery and of Vitrification, - - 134 



XI. Method of increasing shocks, and experiments, wdth 

 Professor Henry's apparatus for obtaining sparks and 

 shocks from the Calorimotor ; by C. G. Page, - 137 



XII. Observations on the Tails of Halley's Comet, as they 

 appeared at Union College, Schenectady, N.Y., in Oct. 

 18.35; by Prof. B. F. JosLiN, - - - - 143 



XIII. Solution of two diophantine Problems ; by Prof. Theo- 

 dore Strong, ------- 156 



miscellanies. foreign and domestic. 



Astronomy. 



Supposed new Planet, 158 



Natural Philosophy. 



1. On Electricity by contact, 159 



2, 3, 4. Effects of Electricity on Vegetation — Chemical Action 



of the Solar Spectrum — Theory of the Universe, - - 160 

 5. Congelation of Mercury by Natural Cold, - - - 161 



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