Scientific American 1920 to 1929

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1920-09-11: New Yorks Skyline Artisans: Structural Iron Workers1920-09-18: Inspecting 140 Separate Points of An Automobile Engine Cam Shaft1920-09-25: Submarine s-5 Signaling for Help Through Hole Cut in Stern1920-10-02: Seventy-Fifth Anniversary Number: the Materialized Dream of Seventy-Five Years of Progress1920-10-09: With the Chemists Who Keep Tabs on Our Leading Industries1920-10-16: PUTTING GRAVITY TO WORK IN THE ERECTION OF CONCRETE BUILDINGS1920-10-23: Melting Gold Coins in the United States Assay Office1920-10-30: Daring Exploit of Our Navel Contestants in the Recent Balloon Race1920-11-06: How the Blind May Read All Books By Means of Optophone1920-11-13: A Chain Bucket Machine That Digs, Shreds And Scatters Peat1920-11-20: Using the Vertical Camera To Photograph Automobile Parts1920-11-27: Detecting And Locating Automobile Engine Troubles with a Stethoscope1920-12-04: Transferring Coal From the Ships Hold To the Coal Pile1920-12-11: Measuring a Years Crop of Snow in the California And Nevada Mountains1920-12-18: Tuning Up a Giant German All-Metal Airplane for a Long Flight1920-12-25: Filling Tank Cars with Oil At a Leading American Refinery
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1920-09-11: New Yorks Skyline Artisans: Structural Iron Workers

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