THE

LONDON AND EDINBURGH

PHILOSOPHICAL MAGAZINE

AND

JOURNAL OF
OF SCIENCE.

CONDUCTED BY

SIR DAVID BREWSTER, K.H. LL.D. F.R.S. L. & E. &c.

RICHARD TAYLOR, F.S.A. L.S. G.S. Astr. S. &c.

AND

RICHARD PHILLIPS, F.R.S. L. & E. F.G.S. &c.

"Nec aranearum sane textus ideo melior quia ex se fila gignunt, nec noster
vilior quia ex alienis libamus ut apes." JUST. LIPS. Monit. Polit. lib. i. cap. 1.

VOL. VI.

NEW AND UNITED SERIES OF THE PHILOSOPHICAL MAGAZINE
AND JOURNAL OF SCIENCE.

JANUARY-JUNE, 1835.

LONDON:

PRINTED BY RICHARD TAYLOR, RED LION COURT, FLEET STREET,
Printer to the University of London.

SOLD BY LONGMAN, REES, ORME, BROWN, GREEN, AND LONGMAN; CADELL;
BALDWIN AND TRADOCK; SHERWOOD, GILBERT, AND PIPER; SIMPKIN

AND MARSHALL; AND S. HIGHLEY, LONDON:― BY ADAM

BLACK, EDINBURGH; SMITH AND SON, GLASGOW;

HODGES AND M'ARTHUR, DUBLIN;

AND G. G. BENNIS, PARIS.

REESE LIBRARY

OF THE

UNIVERSITY

CALIFORAVA,

NUMBER XXXI.-JANUARY.

Mr. J. F. W. Johnston on the Dimorphism of Baryto-calcite..

Rev. Patrick Keith on the Structure of Animals..

Rev. Baden Powell's Abstract of the essential Principles of

M. Cauchy's View of the Undulatory Theory, leading to an

Explanation of the Dispersion of Light; with Remarks

Dr. C. J. B. Williams's Observations on the Production and

Propagation of Sound

Dr. Faraday's Experimental Researches in Electricity.

Eighth Series.

Dr. Olbers on the approaching Return of Halley's Comet..

Mr. R. Phillips on the Quantity of Water contained in cry-

stallized Barytes and Strontia

New Books:-Allan's Manual of Mineralogy, comprehending

the more recent Discoveries in the Mineral Kingdom ...

Proceedings of the Royal Society

Geological Society

Zoological Society

Linnæan Society

Page

1

16

25

34

45

52

53

55

63

68

72

73

Cambridge Philosophical Society

Royal Medals to be awarded by the Council of the Royal So-

ciety, for the most Important Discoveries and Investigations

in Science, in the years 1836 and 1837

75

Mr. W. C. Trevelyan on the Occurrence of Fragments of Gar-

net in the Millstone Grit-Mr. H. J. Brooke's Mineralogical

Notices

76

On the Juice of Eschscholzia Californica-Herrmann Frick's

Analysis of Nadelerz..

M. Horace Demarçay on the Employment of insoluble Salts

in Analysis....

79

Meteorological Observations made by Mr. Thompson at the

Garden of the Horticultural Society at Chiswick, near

London, and by Mr. Veall at Boston..

NUMBER XXXII.-FEBRUARY.

Mr. D. Mushet on the Practicability of alloying Iron and Cop-

per.

Mr. A. Trevelyan's Further Notice of the Vibration of Heated

80

81