THE

AMERICAN JOURNAL

OF

SCIENCE AND ARTS.

CONDUCTED BY

PROFESSORS B. SILLIMAN, B. SILLIMAN, Jr.,

AND

JAMES D. DANA,

IN CONNECTION WITH

PROF. ASA GRAY, OF CAMBRIDGE,
PROF. LOUIS AGASSIZ, OF CAMBRIDGE,
DR. WALDO I. BURNETT, OF BOSTON,
DR. WOLCOTT GIBBS, OF NEW YORK.

CONTENTS OF VOLUME XVII.

NUMBER XLIX.

ART. I. Eulogy on Von Buch; by Professor COTTA,

II. Extracts from the Report on the Geology of the Lake Supe-

rior Land District; by J. W. FOSTER, and J. D. WHITNEY,

III. Analysis of Tin Pyrites; by Dr. J. W. MALLEt,

IV. Notice of the Hail Storm which passed over New York City,

on the first of July, 1853; by Professor ELIAS LOOMIS,

V. Description of a Tertiary Rainbow; by CHARLES Hartwell,

VI. The Earl of Rosse's Telescopes, and their Revelations in the
Sidereal Heavens; by Rev. W. SCORESBY, D.D., F.R.S., etc.,

VII. Researches on the Development of Viviparous Aphides; by

WALDO I. BURNETT, M.D.,

VIII. Mineralogical Contributions; by JAMES D. DANA,

IX. Reviews and Records in Anatomy and Physiology; by

WALDO I. BURnett,

89

X. Biography of Berzelius; by Professor H. ROSE,

XI. Correspondence of M. JEROME NICKLES-Obituary: François

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 on linen cloth: Pyrogallic acid in wood vinegar, 120.

103

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:

On the supposed new metal, Aridium, 122.-Preparation of pure Caustic Potash : Den-

sity of Selenium: New Alkaloids, 123.-Preparation of Valerianic Acid from Fusel

Oil: Constitution of Butter, 124.-Preparation of Ferrocyanhydric Acid: Separation

of Nickel from Cobalt: On a general method of volumetric analysis, 126.-Volu-

metric determination of manganese, 126.-Vessels for the preservation of fluohydric

acid, 127.