Volume 19, Issue 486supp
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Features
The New Votive Church at St.Petersburg
The Shoring of Buildings
Ventilation without a Draught
A Sheffield Corner
The Dying Achilles.—A Marble Statue
A Great Magnesia Mine
How to Make Gelatino—Chloride Paper for Printing without Developing
The Rolling Planimeter
Cyanide of Potassium
Improved Potash Developer for Collodion Emulsion Plates for Transparencies, etc
The Production of Ammonia from the Nitrogen of Minerals
The Perfumer's Manual
An Experienced Manufacturer