Some Alloys Suitable for Instrument Work—I
A Neglected Field for Investigation
Volume 75, Issue 1936supp
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Features
Non-Inflammable Cinematograph Films
Proposed United States Aviation Field
Bill Before Congress for an Appropriation of $400,000
The northern Railway of Cameroon
A Difficult Task for the Engineer by the Berlin Correspondent of the Scientific American
The Reality of Molecules
A Resume of the Overwhelming Experimental Evidence Gathered Within the Past Decade
The Educational Work of a Great Museum
What Are the Chief Functions of a Museum
Mental Tests to Grade Pupils at School
In the Background of the Stars
Worlds in the Making
The Autostable
A Flying Machine Possessing a High Degree of Automatic Stability
Our National Forests
Their Value, Management, and Needs
Power from Waste Fuel
Manufacturing the Circular Cut File
Phosphorescent Plants
The Manufacture of Chemically Pure Acids
Some of the Problems Encountered
Corrsepondence
[The editors me not responsible for statements made in the correspondence column. Anonymous communications cannot be considered, but the names of correspondents will be withheld when so desired.]