[Illustration] SCIENTIFIC AMERICAN SUPPLEMENT NO. 514 NEW YORK, NOVEMBER 7, 1885 Scientific American Supplement. Vol. XX., No. 514. Scientific American established 1845 Scientific American Supplement, $5 a year. Scientific American and Supplement, $7 a year. * * * * * TABLE OF CONTENTS. I. CHEMISTRY.--Chlorides in the Rainfall of 1884. Apparatus for Evaporating Organic Liquids.--With description and 3 figures. II. ENGINEERING AND MECHANICS.--Relative Costs of Fluid and Solid Fuels. The Manufacture of Steel Castings. Science in Diminishing Casualties at Sea.--Extract of a paper read before the British Association by DON ARTURO DE MARCOARTER. Improved Leveling Machine. 9 figures. The Span of Cabin John Bridge. Improvements in Metal Wheels. 3 figures. Apparatus for the Production of Water Gas. 3 figures. III. TECHNOLOGY.--The Blue Print Process.--R.W. JONES. Reproductions of Drawings in Blue Lines on White Ground.--By A.H. HAIG. A Plan for a Carbonizing House.--With full description and 5 figures. The Scholar's Compasses. The Integraph.--With full description and engraving. Apparatus for the Manufacture of Gaseous Beverages. 2 engravings. Sandmann's Vinegar Apparatus. 1 figure. Field Kitchens. 8 figures. A New Cop Winding Machine. 3 figures. The Preservation of Timber.--Report of the Committee of the American Society of Engineers.--The Boucherie process.--Experiments.--Decay of timber. IV. PHYSICS, ELECTRICITY, LIGHT, ETC.--Apparatus for Measuring the Force of Explosives.--With engraving. Lighting and Ventilating by Gas.--Advantages of gas over electricity, etc.--By WM. SUGG. 2 figures. Ander's Telephone. 1 figure. Brown's Electric Speed Regulator. 1 figure. Magneto-electric Crossing Signal. 2 figures. The Chromatoscope.--An aid to microscopy. V. ART AND ARCHITECTURE.--The Barbara Uttmann Statue at Annaberg, Saxony. Improvements in Concrete Construction.--Use of Portland cement.--System of building in concrete invented by Messrs. F. & J.P. West, London. Albany Buildings. Southport.--An engraving. VI. PHYSIOLOGY, HYGIENE, ETC.--The Sizes of Blood Corpuscles in Mammals and Birds.--A table. The Absorption of Petroleum Ointment and Lard by the Skin. VII. MISCELLANEOUS.--The Missing German Corvette Augusta.--With engraving. The Tails of Comets.--The effect by a disturbance of solar waves, and not by special matter. * * * * * ROMAN REMAINS AT LEICESTER, ENGLAND.