Ketones, Or Acetones, a class of bodies composed of an acid radical united with an alcohol radical. Nearly all the ketones now known consist of the radical of a fatty acid combined with one of the corresponding alcohol radicals, their general formula being CmH2m +1 and C n H2n -1O, where m may be either greater or less than n. When m=0, the ketone becomes an aldehyde, H. C„H2n -1O=C n H2n0; the ketones may be therefore regarded as aldehydes in which one atom of hydrogen is replaced by an alcohol radical. Ketones are either simple or compound. In the simple, m=n - 1, so that their general formula is Cn -1H2n -1,C nH2n -1O = C2n -1H4n_20. Acetic or common acetone, or methyl acetyle, where n=2, is CH3C2H30. Both the simple ketones are produced by heating the barium or calcium salts of the fatty acids, whereby two atoms of the salt are decomposed in such a manner that the acid radical of one of them is resolved into the next lowest alcohol radical and carbonyle.
Kew, a village and parish of Surrey, England, on the S. bank of the Thames, 7 m. S. W. of St. Paul's, London, famous for the royal botanic gardens, the richest in the world, comprising 75 acres, and open gratuitously to the public daily, including Sunday. They contain a palm house 362 ft. long, 100 ft. wide, and
The Museum at Kew.
64 ft. high, houses for cacti, tanks for the Victoria regia water lily, and a most extensive collection of Australian trees and plants. The old palace of Kew was the residence of George III. and his family. The surrounding pleasure grounds cover an extent of 245 acres, tastefully laid out. The observatory is chiefly used as a meteorological station.
Kewaunee, an E. county of Wisconsin, bordering on Lake Michigan and drained by Kewaunee and Red rivers; area, 360 sq. m.; pop. in 1870, 10,128. It has a rolling surface and a fertile soil, and is well wooded. The chief productions in 1870 were 120,065 bushels of wheat, 21,123 of rye, 73,554 of oats, 58,866 of potatoes, 20,636 of peas and beans, 124,091 lbs. of butter, and 5,110 tons of hay. There were 842 horses, 2,407 milch cows, 1,940 working oxen, 2,582 other cattle, 1,546 sheep, and 3,865 swine; 3 breweries, 5 flour mills, and 10 saw mills. Capital, Kewaunee.
Keweenaw, a N. W. county of the upper peninsula of Michigan, occupying the extremity of Keweenaw point, which is surrounded by Lake Superior on all sides except the S. W., and including Isle Royale; area, about 575 sq. m.; pop. in 1870, 4,205. The surface is hilly, and near the centre mountainous. Sandstone underlies a portion of it. It is productive of copper, and mining is the principal occupation of the people. In 1870 there were 6 mines, producing to the value of $823,447, 6 quartz mills, and a manufactory of explosives and fireworks. In 1872 the yield was 1,836 tons of ore. Capital, Eagle River.