Herman Frasch
Recipient of This Year's Perkin Medal
Features
The Purity of Natural Waters—II
The Influence of Aquatic Organisms, of Domestic Sewage, and Industrial Waste
Electric Furnaces of the Induction Type
Electrical and Metallurgical Features, With a Summary of Costs
A Gasoline Switchinǵ Locomotive
A Larǵe Railway Ferry Steamer for the Volǵa
A Boat Designed for Service Under Peculiarly Difficult Conditions
Economic Aspects of the Smoke Nuisance
Chimneys Need Not Be “Smokestacks”
Recent Proǵress in Spectroscopic Methods—I
Past Achievements and Future Prospects
The Resistance of the Air and Aviation
Eiffel's Memoir on Experimental Aerodynamics
The Art of Color Photoǵraphy
Its Present State and the Prospects for the Future
Shall Contaǵious Diseases be Abolished?
What Modern Methods of Sanitation Should Do for Us
