The Encyclopedia britannica; a dictionary of arts, sciences, and general literatureWith new maps, and original American articles by eminent writersWith American revisions and additions, bringing each volume up to date . sented Dy rne emperor of China to Kiiifj John V. of Portugal, is saidto support as much as 300 lb. Small loadstones are often verypowerful in proportion to their weight; , Newton is said to haveworn in a ring one that weighed only 3 grains, and yet was able toc^irry about 746 grains; and one in the physical collection at Edin-burgh, formerly belonging to Sir John Leslie, we
The Encyclopedia britannica; a dictionary of arts, sciences, and general literatureWith new maps, and original American articles by eminent writersWith American revisions and additions, bringing each volume up to date . sented Dy rne emperor of China to Kiiifj John V. of Portugal, is saidto support as much as 300 lb. Small loadstones are often verypowerful in proportion to their weight; , Newton is said to haveworn in a ring one that weighed only 3 grains, and yet was able toc^irry about 746 grains; and one in the physical collection at Edin-burgh, formerly belonging to Sir John Leslie, weighing itself 3^grains, had at one time a carrying power of 1560 grains. The introduction of steel magnets, and the perfection to whichthey were gi-adually brought, caused the loadstone to fall into is said that Galileo possessed the art of making steel magnets;ibout the beginning of the 17th century. It was early-discoveredti:at the earths force could be «tilized in magnetizing steel. * For the literature, see Wied., Oalv., g§ 683, 689. ^ See also GeUlers Physikalischcs Wi^rterbuch, art. Magnetismus. Gilbert was aware that a feeble maguetization could be produced inthis way; and ilichell, in his tre
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Keywords: ., bookauthorbaynesth, bookcentury1800, bookdecade1890, bookyear1892
