Hand Grenades, Strategic Positions of the Contending Armies and more

A Mother Ship for Submarines

A Combined Salvage and Drydock Vessel

Plan for the Improvement of Hell Gate, East River, A Black Finish for Iron and more

Science and the Forger

Instruments and Illustrations in Questioned Document Cases

Milling the Soil

Improving on the Old-Fashioned Plow

A System of Long Distance Typewriting

Eight Messages Sent Simultaneously Over a Single Wire

The Psychology of Batting in Baseball, Good Roads Legislation