* 
Vill CONTENTS. 
Miscellaneous Intelligence —Zinc Oxyd as a Pigment, 430.—Thoughts on Tele- 
graphic Communications Twenty years ago, 431.—Halos and Parhelia, by C. M- — 
Tracy: On Fish destroyed by Sulphuretted Hydrogen in the Bay of Callao, by — 
. J. L. Burrr, 433.—Remarks on the Climate of San Francisco, by Dr. H. 4 
Giszons, 434.—Resuscitation of Frozen Fish, 438.—The Climatology of Arctic — 
America in reference to the fate of Sir John ‘Fiewlin, 439.— Optical Investiga- — 
tions occasioned by the Total Eclipse of the Sun on the 28th of July, 1851, by | 
Dr. v. Feruirzscu, 440.—On the accidental colors which result from looking — 
at white objects, by M. D. M. Sxcurn, 441.—On the difference of Tempera- — 
ture of the Earth and the air immediately above it, by M. Rozer: Extraordinary ~ 
Spots on the Sun: Observations on a Red Snow, which fell in Switzerland on ~ 
the 3d and 4th of February, by M. Enrenzere, 442.—Declination and Inclina- — 
tion of the Magnetic Needle at Paris, 443.— Obituary.— William Thompson, 443. 
Bibliography —Knapp's Chemistry Applied to the Arts and Manufactures, 443.— 
Day, D.D., LL.D., late President of Yale College. A new edition, with addi- 
tions and atheritinsi’ by the author, and Professor ‘Sranxzy, of Yale College, — 
444.—New York Journal of Pharmacy, 447.—Contributions i the Natural His- 
tory of the Fresh-water Fishes of North America, by oe toe Grrarp: Ele- — 
ments of Electro-Metallurgy, by ALrrep Smex, F.R ‘Grundztige der Ge- — 
ognosie und Geologie fir Schule und Haus, nach D. T. said, Dana, Dufrenoy, — 
Hausmann, Naumann, u. A. m. frei hearbeitet, von Dr. Gustav LEonwARD, — 
448.—Report to the Louisiana State Medical Society on the Meteorology, Vital 
Statistics and Hygeine of the State of Louisiana, by E. H. Barton, A:M., M.D.: — 
p’Arcuiac and J. Harmer; Description de la Formation Nummulitique de — 
In it précédée e d’un Essai fine Monographie des Nummulites: S. P. Woop- 
; A Manual of the.Mollusca, or a Rudimentary Treatise of Recent and — 
Scar She lis: Dannemora Jernmalmsfalt i Upsala Lan till des geognostika — 
beskaffenhet skildradt ett Férsdk af A. Erpmann, 449.—Report on Meteor- 
logy, by James P. Espey: Michaux’s Sylva, with Nuttall’s continuation, 450. 
List of Works, 450. 
Index, 451. 
Aprennix, pp. 1-20: American Zoological, Botanica), and Geological - 
Bibliography for the Year 1851.—[To be bound up with vol. xu, the © 
last volume of 1851.) : 
ERRATA. 
Page 119, 4th I. from top, for “90° west of the Urals,” read “90° east of the 
auriferous range of Austra ia 
. 123, 6th |. from bottom, for “ Qdus,’? ' read at * 2do.”" 
P. oc 17th 1. from bottom, he “ grapes,” read “ grasses.” 
, Sth I. - < top, for roxy a,” read *  protoxyd. i 
P. a 16th 1. from bottom, for * this city? * read * Mon 
