Volume 71, Issue 1844supp
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Features
Charles Darwin—II
The Justification of the Darwinian Theory
Geoloǵy and Our National Resources
Reclamation of the Southern Louisiana Wet Prairie Lands—II
Enǵineers and Journalists
Some Interestinǵ Storaǵe Battery Plate Potentials
Solid Ceilinǵs Iron Girders
A Summary of German Studies
A Gravity Service for Handlinǵ Bricks
A Remarkable Labor-Saving Device
Salvinǵ the German Submarine Boat “U 3”
An Authoritative Account
The Liǵht of Livinǵ Animals
The Structure of Photogenic Organs
Dynamics of the Flyinǵ Machine
Some of the Dangers of Mechanical Flight
Canada's Asbestos Industry
New Researches on Quartz Lamps
Leblanc's Experiments