Brearley, Harry Chase, 1870-1940, Ingersoll, Robt. H., & Bro · New York : Pub. by Doubleday, Page & Co. for Robert H. Ingersol & Bros. · leaf 172
First Forms of the Watch Types of table clocks and two of the oldest watches in existenceIn the collections of the Metropolitan Museum. … How a Mechanical Toy Became a Scientific Timepiece at every step of his journey; and the sun would remainsteadily at the same height above the horizon, if he alwayskept to one parallel of latitude. His rate of speed wouldhave to be about eighteen miles a minute, if he chose totravel along the…
Time measurements · Clocks and watches
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