LECTURES on SOUND. With Frontispiece of Fog-Syren, and 203 other Woodcuts and Diagrams in the Text. Crown 8vo. 10s. 6d.

HEAT, a MODE of MOTION. With 125 Woodcuts and Diagrams. Crown 8vo. 12s.

LECTURES on LIGHT DELIVERED in the UNITED STATES in 1872 and 1873. With Portrait, Lithographic Plate, and 59 Diagrams. Crown 8vo. 5s.

ESSAYS on the FLOATING MATTER of the AIR in RELATION to PUTREFACTION and INFECTION. With 24 Woodcuts. Crown 8vo. 7s. 6d.

RESEARCHES on DIAMAGNETISM and MAGNE-CRYSTALLIC ACTION; including the Question of Diamagnetic Polarity. Crown 8vo. 12s.

NOTES of a COURSE of NINE LECTURES on LIGHT, delivered at the Royal Institution of Great Britain, 1869. Crown 8vo. 1s. 6d.

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LESSONS in ELECTRICITY at the ROYAL INSTITUTION, 1875-1876. With 58 Woodcuts and Diagrams. Crown 8vo. 2s. 6d.

FARADAY as a DISCOVERER. Crown 8vo. 3s. 6d.

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