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Scientific American, Vol. 99, No. 25 (December 1908) (1908)

leaf 10

An illustration from Scientific American, Vol. 99, No. 25 (December 1908), 1908, leaf 10
nce. add 2 to 3 (the logarithms of these numbers) =5; and measurement must be adopted in both scales. If it is The clock, intended for a hard physical job like this, must have the alarm winding key so arranged that it required to find the amount, i. e., the sum of the prin- the product 100,000 is… … Drafts closed, alarm set. Arrangement with counterweight Drafts directly connected to Chains released, drafts open. alarm key. to open drafts. LET THE CLOCK OPEN THE FURNACE DRAFTS. © 1908 SCIENTIFIC AMERICAN, INC

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