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posting time:2023-12-06 16:34:24
been so perfected that eight ounces of battery yield one horse
power for six hours, so that two pounds of battery will supply a
horse power for twenty-four hours; a small fifty-horse-power
aeroplane being therefore able to fly four days with a battery
weight of but four hundred pounds.
"Limestone and clarified acid are the principal parts of these
batteries. It was known long ago that there was about as much
imprisoned solar energy in limestone as in coal, but it was only
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