  F.C.S., A. INST. C.E.; LATE PROFESSOR OF CHEMISTRY AT THE ROYAL POLYTECHNIC, ETC. ETC. AUTHOR OF "THE PLAYBOOK OF METALS." NEW EDITION. Illustrated with 470 Engravings, LONDON: GEORGE ROUTLEDGE AND SONS, THE BROADWAY, LUDGATE. LONDON. SAVILL, EDWARDS AND CO., PRINTERS, CHANDOS STREET. Wheatstone's telephonic concert Wheatstone's telephonic concert at the Polytechnic, in which the sounds and vibrations pass inaudible through an intermediate hall, and are reproduced in the lecture-room unchanged in their qualities and intensities. Frontispiece. TO PROFESSOR LYON PLAYFAIR, C.B., F.R.S. PROFESSOR OF CHEMISTRY IN THE UNIVERSITY OF EDINBURGH. Dear Sir, I Dedicate these pages to your Children, whom I often had the pleasure of seeing at the Polytechnic during my direction of that Institution. I do so as a mark of respect and appreciation of your talent and zeal, and of your public-spirited advocacy of the Claims of Science in this great and commercial country. Without making you responsible in any way for the shortcomings of this humble work on Elementary Science, allow me to subscribe myself, Dear Sir, Yours most respectfully, |
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