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 Yustrations on Copper, Stone, and Wood.

LONDON:
LONGMANS, GREEN, AND CO., PATERNOSTER ROW.
Paris:

Leipzig:
FRIEDRICH KLINCKSIECK,

ALFONS DÜRR.

MDCCCLXX.

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

e

CONTENTS OF No. XXV.

PAGE

1

17

ART.

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 Platamam Woodcuts

.. .. ..

III. THE TOTAL SOLAR ECLIPSE OF August last. By William

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

IV. INSTRUCTION IN SCIENCE FOR WOMEN .. .. ..

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 . . . .

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

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

NOTICES OF SCIENTIFIC WORKS.

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 .. ..

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) . .

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

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