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Features

Henry Bell and the “Comet”

The Centenary of the First Passenger Steamboat in Europe

Electrolysis from Stray Currents—IV

Damage Caused to Underground Structures

By Albert F. Ganz

The African Ant

Architects of the Animal Kingdom

The Motor Truck in Manufacturing

Its Utility, Adaptability, Capacity and Economy Under Suitable Conditions

By Harold Whiting Slauson

Sinhalese Iron and Steel of Ancient Origin—II

Beginnings of the Iron Age

By Robert Hadfield

Development of the Monadidea

A Fruitful Field for Microscopic Study

By Aubrey H. Drew

A Projection Lantern Without Objective

By A. Gradenwitz

An Experimental Study of Vortex Motion in Liquids—III

Lord Kelvins's Smoke-ring Model of the Atom

By Edwin F. Northrup

Fish Culture on a Small Scale

New Books, Etc.

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  • The Nature, Origin and Maintenance of Life—II

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Scientific American Supplements Volume 74, Issue 1919supp

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