American Mechanical Engineers

A New System of Apprenticeship

Electric Discharges from Animals and Men

The Expansion of Steam

London Fogs

The Butler Colliery Fire

American Industries.--No. 60

The Manufacture of Chemicals.

The Step of Man

Center Turning Attachment for Lathes

Ericsson's Duplex Caloric Pumping Engine

The Golden Eagle

Natural Ponds for the Cultivation of Carp for Private Use

Agricultural Inventions