Quercitron 3898 chief door of San His skill is host seen in Hi Petronio, Bologna, and the marble fountain in the piazza of Siena. Quercitron, a dy('stuff obtained from the inner bark of the Murk oak (()itcrcm vein- tina). Quercus, a genus of trees and shrubs be- longing to the order CupulitVue. See OAK. Queretaro, town, Mexico, capital of the State of Queretaro, on an elevated plateau; i.$5 m. n.w. of Mexico Cit\. It is a quaint old city, famous for its opals. Cotton manu- facture is the leading industry, Queretaro is one of the most historic towns of the republic The movement for independence began here, and here also Kmpcror Maximilian was be- sieged by Juarez, taken prisoner, and shot in 1807; p. ,}O,ooo. Quern, a stone handnu'll for grinding grain, once commonly used in the British Isles but now practically obsolete. The up|xkr stone, which has a hole in the centre through which the grain is dropped, is made to revolve by means of a peg or handle. Syrian Quern, as used al Present Dnv. the Quesnay, Francois (j 604-1774 K French physician and economist was born in Merey, The founder of the economic school of the physiocrats, his theories are formulated in hi*- articles l!- nonnqite (1758). Quetelet, Lambert Adotphe Jacques (1706-1874), Belgian statistician and astrono iner, was born in Ghent. In jS.'u he was ap- pointed to .superintend the erection of the Brussels Observatory, which was constructed according to his plans and of which he hi.ranui1 director. He is, however, best known as a statistician. Quctta, locally known as Shalkot, chief town of Quettit dislnct, British Baluchistan; 20 m, n.w. of Holun Pass. It is over 5,000 ft. above soa-Iuvt'l, strongly fortified, ami is i\w headquarters of th were for- merly a prerogative of the chiefs, and it now serves as the national symbol of Guatemala. Quezaltcnango, town, Central America, in Guatemala; 7s m n.w. of Guatemala City. An earthquake in I<)Q,> practically ruined the city and destroyed many fine coffee planta- tions; p. .^0,1, -5. Quezon, Manuel Luis (1^78-10,44), Fil- ipino lawyer and political leader; a revolu- tionist under Aguinaldo, he was resident commissioner to the 11. S., njcv) i(» JJk> later became president of the Philippine senate and supporter ot the law, iu.*4, providing for the 10 year commonwealth under \\ S. juris- diction to be followed by Philippine inde- pendence. Quo/on was Heeled President of the commonwealth in i<>,^, for a six vear term, lie made a dramatic CM ape from Corrcgidor after its capture by the Japanese and came to the IT nit eel States May 6, 104.!. Quiche. Sri* Maya-Quiche. Quichuas, or QuecHuas, a civili/ed people of South America, formerly dominant in Peru, where they still form the great majority of the population. There were six main branches. Quichuan is a highly polysynthetic stock lan- guage, rich, sonorous, and flc.xihle, with a copious oral literature. Quicksand, sand which is mixed with water to such an extent that it forms a pulpy mass, unable to support the weigitt of men or animals. It is usually very tine, and is mixed with clay or calcium carbonate, which enables i! to retain moisture. Quicksilver. Sty Mercury. Quidor, John (iKoo»*