Features
A New Era of Alloys
The Transit of Venus
Recent Progress in Oyster Farming
New Stop-Valve for Locomotive Steam Pipes
Machine for Making Spikes
Siemens' Unipolar Machine
Garden Destroyers.—Gall Flies of the Oak—"Cynipidæ."
Theater Fires.--Fireproof Fittings Demanded
Mechanical Inventions
Miscellaneous Inventions
Engineering Inventions
Agricultural Inventions
Departments
- Departments
Correspondence
Recently Patented Inventions
Recent Inventions
Business and Personal
Notes and Queries
Index of Inventions
