Volume 28, Issue 5
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Features
Improved Horizontal Testing Machine
Entomology in Congress
Gas Light and Steam Heat
The Vienna Show in the Senate
The Ocean Tides as a Prime Motor
The Duplex Telegraph Instrument in England
What is the Use?
Balancing Machinery
Gears for Changing Direction of Motion
Early Metallurgy
The Proportions of Pipes
Guide for Setting Slide Valves
Professor Tyndall's Fifth Lecture in New York--The Invisible Rays
The Telescope in the Cambridge University
Gleanings in Science and Art
Improved Seed Planter
Cooling Our Houses
New Bridge Over the Nile
Learn to Draw
Dr. Draper's Researches in Actino-Chemistry
Value of Patents
AND HOW TO OBTAIN THEM. Practical Hints to Inventors.