I. ENGINEERING AND MECHANICS.--Soaking Pits for Steel Ingots.
--On the successful rolling of steel ingots with their own
initial heat by means of the soaking pit process. By JOHN GJERS.
6 figures.--Gjers' soaking pits for steel ingots.
Tempering by compression.--L. Clemandot's process.
Economical Steam Power. By WILLIAM BARNET LE VAN.
Mississippi River Improvements near St. Louis, Mo.
Bunte's Burette for the Analysis of Furnace Gases. 2 figures.
The "Universal" Gas Engine. 8 figures.--Improved gas engine.
Gas Furnace for Baking Refractory Products. 1 figure.
The Efficiency of Fans. 5 figures.
Machine for Compressing Coal Refuse into Fuel. 1 figure.--
Bilan's machine.
Hank Sizing and Wringing Machine. 1 figure.
Improved Coke Breaker. 2 figures.
Improvements in Printing Machinery. 2 figures.
II. TECHNOLOGY AND CHEMISTRY.--Apparatus for Obtaining
Pure Water for Photographic Use. 3 figures.
Black Phosphorus.--By P THENARD.