Features
Electrically-Operated Pneumatic Hammers
“Ounce Metal”
Improvements in Gas Lighting
Is the Sixteen Candle-Power Standard for Electric Lamps out of Date?
The Fireproof Dynamo
How to Construct an Independent Interrupter
Experimental Theater Conflagrations
The Collecting and Testing of Carbonic Acid for Purposes of Carbonization
Treatment of Rivers with Shifting Channels
Greenhouse and Conservatory Heating
Herculaneum
Pajarito Ruins—Their Accessibility
Mars as a Place to Inhabit
Gas as a Source of Power.—I
Generation of Producer, Mond, and Blast Furnace Gases
A New Process of Sterilizing Corks
How Seeds are Carried.—IV
IV. Seeds scattered by Propulsion
