Produced by Juliet Sutherland and the Online Distributed Proofreading Team at www.pgdp.net [Illustration] SCIENTIFIC AMERICAN SUPPLEMENT NO. 620 NEW YORK, NOVEMBER 18, 1997 Scientific American Supplement. Vol. XXIV., No. 620. Scientific American established 1845 Scientific American Supplement, $5 a year. Scientific American and Supplement, $7 a year. * * * * * TABLE OF CONTENTS. I. ARCHITECTURE--Bristol Cathedral--The history and description of this ancient building, with large illustration.--1 illustration. 9904 II. BIOGRAPHY--Oliver Evans and the Steam Engine.--The work of this early pioneer, hitherto but slightly recognized at his true worth as an inventor. 9896 III. CHEMISTRY--The Chemistry of the Cotton Fiber--By Dr. BOWMAN--An interesting investigation, showing the variation in composition in different cottons. 9909 Synthesis of Styrolene. 9910 Notes on Saccharin. 9910 Alcohol and Turpentine. 9910 IV. ENGINEERING--Auguste's Endless Stone Saw--A valuable improvement, introducing the principle of the band saw, and producing a horizontal cut--10 illustrations. 9896 V. ELECTRICITY.--A Current Meter--The Jehl & Rupp meter for electricity described--1 illustration. 9903 Mix & Genest's Microphone Telephone--The new telephone recently adopted by the imperial post office department of Germany--3 illustrations. 9902 Storage Batteries for Electric Locomotion--By A. RECKENZAUN--A valuable paper on this subject, giving historical facts and working figures of expense, etc. 9903 The Telemeter System--By R.F. UPTON--The system of Oe.L. Clarke, of New York, as described before the British Association--A valuable tribute to an American inventor--1 illustration. 9900 VI. METALLURGY.--The Newbery-Vautin Chlorination Process--A new process of extracting gold from its ores, with details of the management of the process and apparatus--1 illustration. 9907 VII. MISCELLANEOUS.--A Gigantic Load of Lumber--The largest barge load of lumber ever shipped--The barge Wahnapitae and her appearance as loaded at Duluth--1 illustration. 9907 Apparatus for Exercising the Muscles--An appliance for use by invalids requiring to exercise atrophied limbs--1 illustration. 9908 Practical Education.--A plea for the support of manual training schools. 9906