From November 1936 Nation Geographic.
A forerunner of the modern 20 and 40 ft shipping containers, these boxes were loaded 5 to a 40 foot flatcar and greatly simplified LCL (Less than Carload) shipping. Presumably the footprint of 8 x10 feet would suit the train car and the narrower dimension would allow them to be also shipped by truck.
T.W. Van Metre, Trains, Tracks and Travel, Simmons Boardman 1926
| Louis T. Henderson;Trains, A Children's Picture Book; M.A. Donahue & Co.1935Trains, A Children's Picture Book; M.A. Donahue & Co.1935 |
T.W. Van Metre, Trains, Tracks and Travel, Simmons Boardman 1926

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