Eva Aldrich

Biographical details

Eva Aldrich,  The blackboard clock (1892)

“ The hour and minute hands are home together, ready to start out and go around again. They are always ready to go and they always go the right way. They never go the wrong way. The minute hand goes all the way around, counts all the minutes and gets back home while the hour hand goes to only one figure, and then we know it is one o’clock, because the hour hand is pointing to it. ”
Source: Gutenberg

Eva Aldrich,  The blackboard clock (1892)

“ If the clock is to be made on a wooden blackboard it will be best to have slips cut from tin for the hour and minute hands, and fastened to the center of the face with a slender screw; but if the board is of hard finish, and a screw of any kind will not answer, the next best plan will be to cut the hands from hard, white pasteboard and fasten them in place by means of a long pin, using a hard piece of pasteboard, cut round, for a washer. ”
Source: Gutenberg

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