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[oL 23. FEBRUARY 1862. No. Ifi Published the First Day of even/ Month. — Price it. 6d. THE LONDON, EDINBURGH, and DUBLIN PHILOSOPHICAL MAGAZINE, AND JOURNAL OF SCIENCE. Beinff a Coniinuation of TUlocVs 'Philosophical Magazine^* Nicholson's 'Journal,' and Thomson's 'Annals of Philosophy.* CONDUCTBD IIY SIR DAVID BREWSTER, K.H. LL.D. F.R.S. L.&E.&c.

SIR ROBERT KANE, M.D. P.RS. M.R.I.A.

WILLIAM FRANCIS, Ph.D. F.L.S. F.R.A.S. F.C.S. JOHN TYNDALL, F.R.S. &c. FOURTH SERIES. N^ 152.— FEBRUARY 1862. WITH TWO PLATES, niustratiye of Mr. A. Chubch'b Pbper on the Structure and Composition of Beekite ; and of Prof. Rbgnault's Paper on the Specific Heat of some Simple Bodies. No. 160^ being the Supplbmbnt to Volume XXII., vnH be published ivith the Number for Mabch. ^ LONDON: raiMTBD BY TAYLOR AND FRANCIS* RBD LION COURT, FLEBT STREET, Printer* and Pubiiskers to the Univertity of London, Sold by Longman, Green, LongmaDt, and Roberts; Piper and Co.; Simpkin, Mnrahnll and Co. ; Whittaker and Co. ; and H. Baillidre, London :<»And by A. and C. Black, and Tbomas Clark, Edinburgh; Smith and Son, Glasgow ;-i- Hodgoa and Smith, Dublin : — and Putnam, New York. (^- i