The New Vickers 4-Inch Quick-Firing Gun
A Rifle for Repelling Torpedo Attack by the English Correspondent of the Scientific American

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A Rifle for Repelling Torpedo Attack by the English Correspondent of the Scientific American
Its Eletrolytic Production
Storage Batteries Part II Switchboard Arrangements
Suggetions by a Practical Aeronaut
A Review of Modern Theories and Discoveries
How Rural Highways May be Improved
A Word on Suspensions
Some Good Formulæ