Scientific American December 4, 1909. 424 … _ ive you continuous record in ink of the tem- J scale.perfectly with otir special switch board in the estimates on perature on a graduated weeklychart. ■ circuit. Ten years actual service with over 56,000 can tell it by our globe imprint, and I Auto-eparkers in operation to testify to its merit.…
Patents · Munn · Apparatus · Device · American supplement · Scientific American · Main shaft · American december · American supplements · Second level · Weather bureau · Middle west · Fresh air · Reinforced concrete
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