WORKS BY

G. B. AIRY, M.A. LL.D. D.C.L.

ASTRONOMER ROYAL, &c.

Treatise on the Algebraical and Numerical Theory of
Errors of Observations and the Combination of
Observations.

Crown 8vo. 68. 6d.

Popular Astronomy.

A series of Lectures delivered at Ipswich. Sixth Edition. 18mo. cloth, 48. 6d. With Illustrations.

SCHOOL CLASS BOOKS,

Uniform with MACMILLAN'S

An Elementary Treatise on Partial Differential Equations.

With Stereoscopic Cards of Diagrams. Crown 8vo. 5s. 6d.

On the Undulatory Theory of Optics.

Designed for the use of Students in the University. Crown 8vo. 68. 6d.

On Sound and Atmospheric Vibrations,

With the Mathematical Elements of Music. Designed for the use of Students of the Universities. Crown 8vo. 9s.

MACMILLAN AND CO. LONDON.

QC

753

.A298

4

A TREATISE

ON

MAGNETISM.

ON

MAGNETISM

Designed for the use of Students in the University.

BY

GEORGE BIDDELL AIRY, M.A. LL.D. D.C.L.

FORMERLY FELLOW, NOW HONORARY FELLOW, OF TRINITY COLLEGE;
LATE LUCASIAN PROFESSOR OF MATHEMATICS, AFTERWARDS PLUMIAN PROFESSOR
OF ASTRONOMY AND EXPERIMENTAL PHILOSOPHY,

IN THE UNIVERSITY OF CAMBRIDGE;

ASTRONOMER ROYAL.

London:

MACMILLAN AND CO.

1870.

[All Rights reserved.]