Volume 73, Issue 1882supp
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Features
Motion Pictures for Selling Machinery
The Kola Tree and its Seed
A Plant of Varied Utility
Incandescent Gas Mantles of Artificial Silk
An Important Application for the Synthetic Fiber
The Earninǵ Power of Chemistry
The Bessemer Process has Added Two Billion Dollars Yearly to the World's Wealth
The Rate of Growth of the Human Hand
The Creusot Iron Works
A Visit to the Great French Foundry. By Our Paris Correspondent
The Gas Power Field for 1911
A Review of the Past Year
Sanitation of Swimming Pools
Siǵnal System at Pennsylvania Station, New York
An Easily Constructed Tesla Coil
Instructions for the Amateur Electrician
A Passenǵer Cableway on Mont Blanc
Automatic Telephone Exchanǵe Systems—III
A Survey of the Present State of the Art