JOURNAL OF SCIENCE.

CONDUCTED BY

SIR W. FAIRBAIRN, BART., F.R.S.; WILLIAM CROOKES, F.R.S.;
ROBERT HUNT, F.R.S.; H. WOODWARD, F.G.S., F.Z.S.;

AND

JAMES SAMUELSON,

OF THE MIDDLE TEMPLE, BARRISTER-AT-LAW,

EDITOR.

VOLUME VII.

With Illustrations on Copper, Stone, and Mood.

Paris:

FRIEDRICH KLINCKSIECK.

Leipzig:
ALFONS DÜRR.

MDCCCLXX.

LONDON: PRINTED BY W. CLOWES AND SONS, STAMFORD STREET AND CHARING CROSS.

ART.

CONTENTS OF No. XXV.

I. LIGHT AND SOUND: an Examination of their reputed

Analogy. By W. F. Barrett, F.C.S., Natural Science

Master at the London International College, &c. With

Coloured Plate and Woodcuts

II. ON THE PRINCIPLES AND METHODS OF SEWAGE IRRIGATION.

With Page Plate and Woodcuts

III. THE TOTAL SOLAR ECLIPSE OF AUGUST LAST.

Crookes, F.R.S., &c. With Coloured Plate and Woodcuts

PAGE

1

17

By William

28

IV. INSTRUCTION IN SCIENCE FOR WOMEN

43

V. ON IDIOCY. By P. Martin Duncan, M.B. Lond., F.R.S., &c.

VI. THE FRENCH IMPERIAL SCHOOL OF FORESTRY. By Alfred

Pengelly, B.A., Cambridge

49

60

VII. THE FULLER'S-EARTH IN THE SOUTH-WEST OF ENGLAND.

By Ralph Tate, Assoc. Lin. Soc., F.G.S., &c. ..

68

NOTICES OF SCIENTIFIC WORKS.

72

Wrought-iron Bridges and Roofs. By W. C. Unwin. (E. & F.

N. Spon)

Habit and Intelligence, in their connection with the Laws of

Matter and Force: a Series of Scientific Essays. By

Joseph John Murphy. (Macmillan)

Jeffreys' British Conchology. (Van Voorst)

Schrauf's Handbook of Precious Stones ..

75

79

81

Senft's Mineralogy and Lithology

Vegetable Teratology: an Account of the Principal Deviations

from the usual Construction of Plants. By Maxwell

T. Masters, M.D., F.L.S. (Ray Society)

Cyclopaedic Science Simplified. By J. H. Pepper. (Warne).

224180