Patents and their Purpose
Notes of Historic Interest
Volume 79, Issue 2057supp
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Features
Engineers' Difficulties with Tropical Telephones
The Value of Birds to Man
The Prismatic Compass
How it Works and Some of its Advantages
Nepal
Notes on a Visit to a Country Inaccessible to Europeans
The Combustion of Coal in Boiler Furnaces
Freight Carrying on the Great Lakes
Where Immense Quantities of Grain, Ore and Coal Are Moved in Bulk
British Shipping Tonnage
Utilizing Wastes in Canning Pineapples
Atoms and Ions—VI
A Comprehensive Discussion Especially as Related to Gases
Safety in Good Lighting
Scientific Aeronautic Research
The New Aerodynamic Laboratory of the Massachusetts Institute of Technology
Development in Electromagnetism—II
A Review of Some Important Problems, and Laboratory Results