This calendar clock, which sold for $5,100 at auction, is said to correct for the days of each month, even in leap years. Do you have a new calendar for the year? With a clock like this one, made in ...
Watch Gary Sullivan's appraisal of an Ithaca double dial calendar clock, ca. 1880, in RECUT: Idaho Botanical Garden, Part 1. Antiques Roadshow is available to stream on pbs.org and the free PBS App, ...
You have to be pretty ambitious to modify a clock to run for 50 years on a single battery. You also should probably be pretty young if you think you’re going to verify your power estimates, at least ...
Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...
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