Volume 21, Issue 542supp
You are currently logged out. Please sign in to download the issue PDF.
Features
Hall's Ozone Machine
Theatrical Mechanism
Dr. Auer's New Incandescent Gas-Burner
Photographic Reproduction of the Luminous Effects of Electricity without the Use of Ordinary Photographic Apparatus
Job's Conundrum
A Lecture on Water-Sanitation
A New Form of Barometer
Machine for Dyeing Yarn in Skeins
Tunnel for Foot Passengers in Stockholm
The Invention of Machines
Experiments against Armored Turrets
Artesian Wells
Requisite and Qualifying Conditions of Artesian Wells *