The SciencesJune 1, 1926
The Applied Science of Public Spending
Through an Effective Budget System Our Government Is Saving Millions This Year
Stories by Albert A. Hopkins
TechnologyMay 1, 1926
Novel Devices for the Shop and the Home, May 1926
A Department Devoted to Recently Invented Mechanical and Household Appliances
The SciencesApril 1, 1926
Notes and Queries, April 1926
TechnologyApril 1, 1926
Novel Devices for the Shop and the Home, April 1926
A Department Devoted to Recently Invented Mechanical and Household Appliances
TechnologyMarch 1, 1926
Novel Devices for the Shop and the Home
A Department Devoted to Recently Invented Mechanical and Household Appliances
The SciencesMarch 1, 1926
The Art of Cutting Diamonds
How the Rough Stone Is Cut, Sawed and Polished to Produce the Most Brilliant of Jewels
TechnologyFebruary 1, 1926
Inventions New and Interesting, February 1926
A Department Devoted to Pioneer Work in the Various Arts
TechnologyJanuary 1, 1926
Inventions New and Interesting, January 1926
A Department Devoted to Pioneer Work in the Various Arts and to Patent News
TechnologyDecember 1, 1925
Inventions New and Interesting, December 1925
A Department Devoted to Pioneer Work in the Various Arts and to Patent News
TechnologyDecember 1, 1925
A Machine that is More than Human
An Amazing Electro-mechanical Device Which Distinguishes Between Thirty Different Shades
TechnologyNovember 1, 1925
Inventions New and Interesting, November 1925
A Department Devoted to Pioneer Work in the Various Arts and to Patent News
TechnologyOctober 1, 1925
Inventions New and Interesting, October 1925
A Department Devoted to Pioneer Work in the Various Arts and to Patent News
TechnologyOctober 1, 1925
Elevators With Electric Brains
The SciencesOctober 1, 1925
Notes and Queries, October 1925
TechnologySeptember 1, 1925
Inventions New and Interesting, September 1925
A Department Devoted to Pioneer Work in the Various Arts and to Patent News
TechnologyAugust 1, 1925
Inventions New and Interesting, August 1925
A Department Devoted to Pioneer Work in the Various Arts and to Patent News
The SciencesAugust 1, 1925
Plumbing the Depths of Neptune's Secrets
Fables of the Sargasso Under the Acid Test of Science
TechnologyJuly 1, 1925
Inventions New and Interesting, July 1925
A Department Devoted to Pioneer Work in the Various Arts and to Patent News
The SciencesJune 1, 1925
Notes and Queries, June 1925
TechnologyJune 1, 1925
Inventions New and Interesting, June 1925
A Department Devoted to Pioneer Work in the Various Arts and to Patent News
TechnologyMay 1, 1925
Inventions New and Interesting, May 1925
A Department Devoted to Pioneer Work in the Various Arts and to Patent News
The SciencesMay 1, 1925
Notes and Queries
This department is intended for queries of general interest. Only a small percentage of the queries we receive can be printed here, the great majority being answered by mail. Except in special cases we cannot solve mathematical problems, give directions for building machinery or answer queries of a special nature which belong within the sphere of the professional engineer. All queries must give the name and address of the inquirer and must be accompanied by return postage. in writing about book orders or subscriptions please use separate sheets, give your name and address on each.
The SciencesApril 1, 1925
Notes and Queries, April 1925
EnvironmentApril 1, 1925
Protection from the Tooth of Time
A Description of the Little-Known Art of Restoring and Preserving Old or Damaged Documents and Prints