Features
The Invention of the Microphone
Preparation of Iron Fuels
Millstones
An Hour with Edison
Unsinkable Steam Vessels
An Ingenious Toy
Lever and Cam Valve
Milk as a Substitute for Blood Transfusion
A Simple Fire Escape
Communication - July 13, 1878
The Etiology of Asiatic Cholera.--a New Theory
Proposed Process for the Fixation of Atmospheric Nitrogen
Improved Beehive
Cross' Improved Gas Condenser
Astronomical Notes - July 13, 1878
The Swiss House at the Paris Exposition
The St. Benoit Twins
Curious Hedge figures
The Leona Goat Sucker
Departments
- Departments
New Books and Publications - July 13, 1878
Notes and Queries - July 13, 1878
Business and Personal - July 13, 1878
Index of Inventions - July 13, 1878
