Volume 31, Issue 787supp
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Features
Steam Engine Valves
Riding Cut-Off Valves-Peculiarities and Merits of the Different Styles
Station for Testing Agricultural Machines
Firing Points of Various Explosives
The Trisection of any Angle
Test Card Hints
Water Softening and Purifying Apparatus
Charles Goodyear
The Electromagnet
A New Electric Ballistic Target
Electric Erygmascope
The Outlook for Applied Entomology
Potash Salts
The Expense Margin in Life Insurance
Science in the Theater
Theatrical Water Plays
The Flood at Karlsbad
Newer Physiology and Pathology
The Composition of Koch's Lymph
What Professor Koch says it is and what it can do