History Of American Agriculture And Transportation
Steam and clipper ships improved overseas transportation: 1860: 1860 30,000 miles of railroad track had been laid 1869 Illinois passed first designated "Granger" law regulating railroads 1869 Union Pacific, first transcontinental railroad, completed: ... Read Article
Freeze-drying - Wikipedia, The Free Encyclopedia
Modern freeze-drying was developed during WWII. Blood serum being sent to Europe from the US for medical treatment of the wounded required refrigeration, but because of the lack of simultaneous refrigeration and transport, many serum supplies were spoiling before reaching their intended recipients. ... Read Article
Apprentice Charging A Refrigeration System. - YouTube
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