Volume 14, Issue 340supp
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Features
John Roach, of New York.—His Ship-Building and his Views
Re-Lighting Safety Lamps by Electricity
Cast Iron Panel by Le Duc
Workpeople's Aid Societies in Alsace
Thermic Conductivity of Minerals and Rocks
The New Great Bell for St. Paul's
The Great Organ at the Crystal Palace
A New Perpetual Motion
Country House, Costing $600 to $800
Gold Wire
Plate Glass Manufacture
Lochmann's Improved Atomizer
The Washing of Clays
On the Intensification of Negatives
Carl Wilhelm Scheele
The Last New Developer
A New Mercuro Cyanide Intensifying Process for Gelatino-Bromide Plates
Manufacture of Lactic Acid
Curiosities of Color
Some Appliances for Gelatino-Bromide Work
The “Chemical Lung”
Notes on the Spongillæ of Buffalo
The Arrival of Man in Europe
Dangers of Well Water
The Microscope in Disease
Notes on the Cotton Industry of India
An Indian Mill Manager