Features
A Novel Boat Rig
Coal-Cutting Machine for Manual Power
Railway Notes
The St. Gothard Tunnel
Geodetic Surveys
Hints on Building Chimneys
Oliver Evans' Model Mill of 1788
Alum in Baking Powders
Preece's Improvements in Telephones
Ceresin
Edison's Recent Telephonic Inventions
A New form of Transmitting Telephone
The Watch Telephone
Some Modifications of the Microphone and Telephone
A Report on underground Telegraph Wires
A Simple Microphone
New Stethoscopic Microphone
Improved Musical Condenser
The Conditions of Health in the Infant
Malaria Not of Vegetable Origin
Mortality in the Principal Cities of the World
Glycerine Cement
Suicide in France
Dyspepsia from Impaired Movements of Stomach
Relations of Syphilis to the Public Health
Poisonous Tin Plate
Caustic Alcohol
(Sodium Alcohol And Potassium Alcohol.)
