Public domain
Fuel oil conservation. Here's blackout insulation--a twofold combination to save you money! Use sections of board for the top half of the window and the bottom half. The board for the upper half of the window, which should be weatherproofed board, can be nailed in place on the outside of the window
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Credit lineFuel oil conservation. Here's blackout insulation--a twofold combination to save you money! Use sections of board for the top half of the window and the bottom half. The board for the upper half of th. 1942-01-01. United States. Office Of War Information. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.