Volume 109, Issue 9
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Features
Pedagogical Laboratories
How Children are Studied in a Russian Laboratory from Their Birth Until Their Twenty-first Year
Dissecting a Military Dirigible Airship
An Interesting Experiment With the New "Vl"
Gas Engine Yacht, A Motorcycle Milkman and more
How Insects Fight
Stings, Mandibles, Horns and Poisons in Warfare