Produced by Juliet Sutherland, Priscilla Walmsley, and the Online Distributed Proofreading Team at www.pgdp.net [Illustration] SCIENTIFIC AMERICAN SUPPLEMENT NO. 1082 NEW YORK, SEPTEMBER 26, 1896. Scientific American, established 1845. Scientific American Supplement. Vol. XLII., No. 1082. Scientific American Supplement, $5 a year. Scientific American and Supplement, $7 a year. * * * * * TABLE OF CONTENTS. PAGE I. ARCHITECTURE.--New Methods of Building Construction at Paris.--A typical French system of construction.--Combination of plaster and iron; cement armé.--1 illustration. 17292 II. AUTOCARS.--The De Dion and Bouton Road Motor.--An elaborate description of this typical French motor operated by steam.--4 illustrations. 17290 III. CHEMISTRY.--An Air Bath.--By B.J.H. COSTE.--1 illustration. 17296 The Feculometer.--1 illustration. 17295 IV. DOMESTIC ECONOMY.--Errors in Our Food Economy.--A very practical paper on scientific nutrition. 17288 V. GEOGRAPHY.--Zanzibar.--An account of the country and the recent events there.--3 illustrations. 17287 VI. MATHEMATICS.--Goodman's Hatchet Planimeters.--Instrument for measuring areas and mean altitudes or irregular figures.--5 illustrations. 17293 VII. METALLURGY.--The Great Krupp Works.--Notes on the great iron and steel works of the German empire, with statistics. 17302 VIII. MINERALOGY.--Precious Stoned--By Prof. HENRY A. MIERS.--Lecture I.--First installment of a most interesting article on the minerals used in the jeweler's art.--3 illustrations. 17298 IX. MINING ENGINEERING.--Firedamp Testing Station at Marchienne-au-Pont.--An elaborate experimental station for investigation into firedamp.--3 illustrations. 17297 X. MISCELLANEOUS.--Device for the Display of Lantern Slides.--An apparatus for the display of lantern slides in the shop window.--A rotating carrier.--2 illustrations. 17295 What the Sea Has Taken.--Destruction of great areas of country in the past, with special reference to the Dutch coast. 17289 Engineering Notes. 17301 Electrical Notes. 17301 Miscellaneous Notes. 17301 Selected Formulæ. 17302