I. ENGINEERING AND MECHANICS--Recent Improvements in
Textile Machinery.--Harris's revolving ring spinning frame.--
New electric stop motion.--New positive motion loom. 6 figures.
Spinning Without a Mule.--Harris's improvements in ring
spinning.
New Binding Machines. 3 figures.
Flumes and their construction. 1 figure.
Chuwab's Rolling Mill for Dressing and Rounding Bar Iron.
9 figures.
Burning of Town Refuse at Leeds. 6 figures.--Sections and
elevations of destructor and carbonizer.
II. TECHNOLOGY AND CHEMISTRY.--Friedrich Wohler.--His
labors and discoveries.
New Gas Burner. 3 figures.--Grimstone's improved gas burner.
Defty's Improvements in Gas Burners and Heaters. 4 figures.
The Collotype in Practice.
Determination of Potassa in Manures.--By M. E. DREYFUS.
III. HYGIENE, MEDICINE, ETC.--The Air in Relation to Health.
By Prof. C. F. CHANDLER.
The Plantain as a Styptic.
Bacteria.
IV. ELECTRICITY, ETC.--Gustavo Trouvé and his Electrical Inventions.
--Portrait of Gustave Trouvé.--Trouvé's electric boat competing
in the regatta at Troyes.
Domestic Electricity.--Loiseau's electric naphtha and gas
lighters.--Ranque's new form of lighter with extinguisher.
Theiler's Telephone Receiver. 2 figures.
An Electric Power Hammer. By MARCEL DEPRETZ. 1 figure.
Solignac's New Electric Lamp. 3 figures.
Mondos's Electric Lamp. 2 figures.
V. METALLURGY AND MINERALOGY.--Aluminum.--Its properties,
cost, and uses.
The Origin and Relations of the Carbon Minerals.
By J.S. NEWBERRY.--An elaborate and extremely valuable review
of the genesis of carbon minerals, and the modes and conditions
of their occurrence.
Estimation of Sulphur in Iron and Steel. By GEORGE CRAIG.
1 figure.