CONTENTS OF VOLUME XVII. 
NUMBER XLIX. 
Page. 
Art. I. Eulogy on Von Buch; by Professor Corra, - 1 
II. Extracts from the Report on the Geology of the Lake Supe. 
rior Land District; by J. W. Fosrer, and J. D. Wuirney, ll 
Ill. Analysis of Tin Pyrites; by Dr. J. W. Matter, - 33 
IV. Notice of the Hail Storm which passed over New York City, 
on the first of July, 1853; by Professor Ex1as Loomis, 35 
V. Description of a Tertiary Rainbow; by Cuartes Hartwett, 56 
VI. The Earl of Rosse’s Telescopes, and their Revelations in the 
Sidereal Heavens; by Rev. W. Scoresby, D.D.,F.R.S.,etc., 58 
VII. Researches on the Development of Lad ola anet ; by 
Watpo I. Burnett, M.D., - . 
VII. Mineralogical Contributions ; by ome D. Si - src 2B 
IX. Reviews and Records in sige 43 and Pat tee oe 
Watpo I. Burnett, - 89 
X. Biography of Berzelius; by Pfofiscor H. Sone, : - 108 
XI. Correspondence of M. Jerome Nicxtts—Obituary: Frangois 
Arago, 113.—Academy of Sciences: Views on the origin of 
terrestrial magnetism, 116.—Artificial magnets: Ascen- 
sional force of Balloons in water, 118.—Manufacture of Sal- 
ammoniac from the residues of gas works: Separation of 
bromine from iodine: Artificial Silicification of limestones, 
119.—Vitrification of Photographic pictures: Photographic 
Portraits 6n linen cloth: Pyrogallic acid in wood vinegar, 120. 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics.—On the polarization of light by refraction through a metal: Ad- 
ditional experiments on the internal dispersion of light, 121.—On Chemical affinity : 
: Den- 
Oil: Constitution of Butter, 124.—Preparation of Hoe ae Acid: ; 
of Nickel from Cobalt: On a general method of volumetric analysis, ee ides 
metric determination of manganese, 126.—Vessels ie the preservation of fluohydric 
