Scientific American Supplement, No. 458, October 11, 1884 eBook

This eBook from the Gutenberg Project consists of approximately 150 pages of information about Scientific American Supplement, No. 458, October 11, 1884.

Scientific American Supplement, No. 458, October 11, 1884 eBook

This eBook from the Gutenberg Project consists of approximately 150 pages of information about Scientific American Supplement, No. 458, October 11, 1884.

Sr.  Don Romero Ancona, then Governor of Yucatan, was very much provoked because we would not reveal the whereabouts of our find, but gained nothing by it, and the beautiful monument is still safe.

ALICE D. LE PLONGEON.

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Rolled gold is made by casting an ingot of brass, and while this is still hot pouring upon it a thin layer of gold alloy.  The ingot when cold is forced between steel rollers until a long, thin ribbon is produced, of which the proportion of gold and brass is the same as of the ingot.  The percentage of gold is reduced as low as two and three per cent.  This rolled gold is used in making cheap bracelets and watch chains.  It wears from one to ten years.

A CATALOGUE, containing brief notices of many important scientific papers heretofore published in the SUPPLEMENT, may be had gratis at this office.

* * * * *

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Scientific American Supplement, No. 458, October 11, 1884 from Project Gutenberg. Public domain.