
Testing a Safety System for Storing and Distributing Inflammable Liquids

Testing a Safety System for Storing and Distributing Inflammable Liquids

X-Ray Moving Pictures of the Digestive Tract
A New Way of Studying Diseases of the Stomach

An Improved Box for the New York Fire Alarm Telegraph

The New Coolidge Roentgen Ray Tube

Inspecting Track Scales for the United States Government
New Test Car and Equipment of the National Bureau of Standards

A Radical Improvement in Cabling
Eliminating the Siphon Recorder

How the Government Tests Paper
The Methods and Machines of the Bureau of Standards

Saving $2,000,000 Water Waste a Year
The Remarkable Result Accomplished by a Simple Invention

New York's Fire College
Fire-fighting and Rescue Work Reduced to a Science

A Fireman's Smoke Protector

New York's Automobile Fire Service
Another Step Toward the Retirement of the Horse

An Automobile Water Tower
New York's Novel Fire Apparatus

The Life of the Deep Sea
The Modern Science Of Marine Biology

What are Sun-Spots?
Illustrated With Photographs From The Yerkes Observatory

The Reconstruction of the New York Fire Alarm Telegraph System

Testing Weights and Measures in New York City

Fire Fighting Without Fire Engines

The Elevator Installation of the Metropolitan Life Tower, An Ingenious Way of Examining the Contents of the Duodenum

Automobile Fire Engines
A New Type of Motor Vehicle

The Standard Electrical Cell--Its use and Its Practical Value

A Museum to Illustrate the Development of Mathematics

The Rockefeller Institute for Medical Research

Successful Test of New York's High-Pressure Fire Service

The Sun's Radiation and Its Study