Article: Time machine.(survey of articles from Popular Mechanics, 10, 20, 30, 40, 50, and 60 years ago)

100 Years Ago: July 1902

Make Mine Electric

Electricity had driven the mule from streetcar duty and was also rapidly displacing it from the coal mines. Electric locomotives were able to haul 500 tons at a time--a real challenge for a mule team. PM had the inside story on how this plate of ice, 16 ft. long x 9 ft. high, was produced. One of the article's headlines said it all: "All that is necessary is to extract heat from water and it becomes ice." Incidentally, the workers are standing behind the ice, not inside it.

[ILLUSTRATIONS OMITTED]

90 Years Ago: July 1912

Liner Notes

Suggestions for oceanliner lifesaving ...

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