Mexican Indians use reed and palm to make objects of everyday use in Mexico. Reed plants along Lerma River in Mexico. Map shows Mexico and Rio Grane. Mexico City in map. Location of Lerma River near Mexico City. Reed plants growth near by river. Men stand in water and cut plants. Man pushes bundle of Reed over water.
Douglas Aircraft Engineers donning special helmets, shoes and cold weather clothing before entering Low Temperature Laboratory in Santa Monica, California. The temperature in the chamber is below 60 degrees. Engineers enter the cold chamber to test aircraft equipment. They check the equipment inside the cold chambers.
Los Angeles County Relief Administration (LACRA) workers cut and sort lumber in a Santa Monica, California lumber yard, largely comprised of old discarded sets from Hollywood movie studios. Truckloads of old wood arrive at the yard and it is sorted and cut further. Woman with a young boy stands in front of stacks of smaller lumber available to citizens as firewood, for aid during the Great Depression. The boy pulls his small wagon loaded with firewood.
Scenes from 1934 movie about Westward Expansion of the United States at end of the 19th Century. View of San Francisco harbor with a steamer passing in the background. Inserted scenes from 1906 film of Market Street taken from a cable car headed toward the Oakland Ferry. It shows hectic uncontrolled vehicle and pedestrian traffic in the street. Change of scene shows current (1934) views of San Francisco from a vantage point above the city.
Rocket cooling investigations influenced rocketry pioneer, Professor Eugen Sänger's design for his rocket motor, S.R.3. View of his drawings and notes from 1934. Display of mechanical parts from the S.R.3. Items comprising test apparatus for the rocket motor, with various parts labeled. Mechanical Testing setup in Sänger's work shop and instrumentation, labeled in German, showing things such as motor thrust, pump pressure, liquid oxygen level, etc. The first burn test on March 15, 1934. Sänger stands in doorway of his workshop in Vienna, using a long pole to initiate the burn. Various views of flames emanating from the prototype rocket motor during the burn test. A revised sketch of the S.R.3 prototype rocket motor. Test of this version with flames barely visible due to complete combustion, during start-up and operation.
Drawing of "L-Rocket," dated January 5, 1933. Professor Eugen Sänger's S.R.6 Rocket motor from May 23, 1934, in which the combustion chamber is the same design as the slim nozzle of the L-Rocket. Actual parts of the S.R.6 motor. Plan of Rocket motor S.R.7 from May 21, 1934, with fuel inlet cooling by coiled pipe to the nozzle jacket. Second version of S.R.7 from June 5th, with cooling in the outer shell. Drawings of Versions three and four of the S.R.7. and scenes of the actual hardware held in Sänger's hand. He unscrews part and points out the features. He points out the cooling coils around the combustion chamber. Another version is similarily displayed after he removes its outer shell.