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rer's Note

SUDSTANUD orroressor TANAUAT TEUTUNEO on the NON-METALLIC ELEMENTS, delivered before the Members of the Royal Institution. Edited from the Lecturer's Notes, by Dr. SCOFFERN. Fep. 8vo. price 5s. 6d.

ROBERT HUNT'S RESEARCHES on LIGHT in its CHEMICAL RELATIONS: Embracing a Consideratio of all the known Photographic Processes. Second Edition revised; with Plate and Woodcuts. 8vo. price 10s. 60.

Dr. PEREIRA'S LECTURES on POLARISED LIGHY. Second Edition, enlarged from Materials left by tae Author; and edited by the Rev. B. POWELL, SH.A. Fcp. 8vo. with Wovucuts, price 7s.

CA emplic H

afe 105. 201

London : LONGMA

ONGMANS.

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