
TechnologyOctober 15, 1921
The Aviator's Tell-Tales
How the Pilot Keeps Track of Distances and Speeds, and Stays in the Air on an Even Keel

The Aviator's Tell-Tales
How the Pilot Keeps Track of Distances and Speeds, and Stays in the Air on an Even Keel

Checking Up the Gas Meter
How New York's Consumers Are Assured That They Get What They Pay For and No More