View of comparative engineering tests for the Equitable Building Company in Denver, Colorado; shows men by an arch and a kiln or oven, bricks, steel girders, and a smokestack. Letters read: "D11."
Equitable Building (Denver, Colo.)--1890-1900.; Building materials--Effect of temperature on--Colorado--Denver--1890-1900.; Building materials--Testing--Colorado--Denver--1890-1900.; Denver (Colo.)--1890-1900.; Testing--Colorado--Denver--1890-1900.
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