| TABLE OF CONTENTS |
|---|
| I. | [ENGINEERING AND MECHANICS.--New Eighty-ton SteamHammer at the Saint Chamond Works, France.--7 figures.--Elevationof hammer.--Profile-- Transverse section.--Profile view offoundation, etc.--Plan of plant.--General plan of the forgingmill.--Details of truss and support for the cranes.] |
| [Great Steamers.--Comparative details of theServia, the City of Rome, the Alaska, and the GreatEastern.] |
| [Improved Road Locomotive.--2 figures.--Side andend views] |
| [American Milling Methods. By ALBERT HOPPIN.--Tenyears' progress.--Low milling.--Half high milling.--Highmilling.--Important paper read before the Pennsylvania StateMillers' Association.] |
| [Machine for Dotting Tulles and other LightFabrics.--3 figures.] |
| II. | [TECHNOLOGY AND CHEMISTRY.--The Reproduction andMultiplication of Negatives. By ERNEST EDWARDS.] |
| [A New Method of Making Gelatine Emulsion. By W. K.BURTON.] |
| [The Pottery and Porcelain Industries ofJapan.] |
| [Crystallization Table.] |
| [The Principles of Hop Analysis. By Dr. G. O.CECH.] |
| [Water Gas.--A description of apparatus forproducing cheap gas, and some notes on the economical effects ofusing such gas with gas motors, etc.--By J. EMERSONDOWSON.] |
| [On the Fluid Density of Certain Metals. ByProfessors CHANDLER ROBERTS and T. WRIGLESON.] |
| III. | [PHYSICS, ELECTRICITY, ETC.--Electric Power.--Thenature and uses of electricity.--Electricity vs. steam.] |
| [On the Method of Obtaining and Measuring VeryHigh Vacua with a Modified Form of Sprengel Pump. By Prof OGDEN N.ROOD.--4 figures.-- Apparatus for obtaining vacua of one fourhundred-millionth of anatmosphere--Construction.--Manipulation.--Calculations.--Results] |
| IV. | [ART, ARCHITECTURE, ETC.--Old Wrought Iron Gates,Guildhall. Worcester, England. 1 figure.] |
| [The French Crystal Palace, Park of St. Cloud,Paris. 1 full page illustration.] |
| [Suggestions in Architecture. A CastellatedChateau. Perspective and plan. Chateau in the ÆgeanSea.] |
| V. | [HYGIENE AND MEDICINE.--Hydrophobia Prevented byVaccination.] |
| [On Diptera as Spreaders of Disease. By J. W.SLATER.] |
| [On the Relations of Minute Organisms to CertainSpecific Diseases.] |
| VI. | [ASTRONOMY--The Centenary of the Discovery ofUranus. By F. W. DENNING. 2 figures. Approximate place of Uranusamong the stars at its discovery, March l3, 1871.--Orbits of theUranian Satellites.] |
| VII. | [BIOLOGY, ETC.--The Varying Susceptibility ofPlants and Animals to Poisons and Disease.] |
| [Kind Treatment of Horses.] |
