Scientific American 1920 to 1929

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1920-01-03: PROGRESSIVE ASSEMBLY IN THE AUTOMOBILE FACTORY1920-01-10: HAULING LOGS WITH A WINTER VERSION OF THE SMALL GASOLINE TRACTOR1920-01-17: In Peace Time Dress: Modified Tank At Work in Devastated France1920-01-24: HUGE UNLOADERS FOR TRANSFERRING COAL BETWEEN SHIPS AND CARS1920-01-31: SHOOTING A LIFE LINE TO A DISABLED SHIP1920-02-07: Speeding Up the Handling of Lumber with the Straddle Truck1920-02-14: SPEEDING UP THE ICE HARVEST WITH THE GASOLINE DRIVEN SAW1920-02-21: High Speed Railroading with Airplane Engines And Propellers1920-02-28: A Machine That Eats Its Way Through the Heavest Snows1920-03-06: ELECTRIC RAILROADING AT ITS BEST. CROSSING THE GREAT DIVIDE1920-03-13: Cleaning Railroad Ballast To Improve Drainage1920-03-20: FITTING THE SECTIONAL DRY DOCK TO THE SHIP1920-03-27: Tuning Up a Giant Airplane for Flight1920-04-03: LOWERING THE ENGINE INTO A STANDARDIZED AMERICAN SHIP1920-04-10: BLOWING GLASS BALLOONS FOR FUTURE WINDOW PANES1920-04-17: CRANKING THE AIRPLANE PROPELLER WITH A FLASK OF AIR1920-04-24: NEARING THE TOP IN THE CONSTRUCTION OF A REINFORCED CONCRETE CHIMNEY1920-05-01: OPERATING THE CAMERA IN THE PROCESS OF PHOTO-ENCRAVING
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1920-03-06: ELECTRIC RAILROADING AT ITS BEST. CROSSING THE GREAT DIVIDE

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