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Online Encyclopedia
Originally appearing in Volume V01, Page 531 of the 1911 Encyclopedia Britannica.
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ALDBOROUGH, a village in the Ripon parliamentary division of the West Riding of Yorkshire, England, 16 m. W.N.W. of York, and 1 m. E. of the market town of Boroughbridge, which has a station on a branch of the North-Eastern railway. Aldborough formerly returned two members to parliament, but was disfranchised by the Reform Act of 1832. The place is remarkable from its numerous ancient remains. It was the Isurium Brigantum of the Romans, originally perhaps a capital of the Brigantes tribe, and afterwards a Romano-British town of considerable size. Inscriptions, beautiful mosaics and other traces of comfortable houses have been found, with many potsherds, coins and bronze, iron and other objects; and a large part of the town walls, several mosaics and parts of buildings, can be seen.' A fine collection is kept in the Museum Isurianum in the grounds, of The aldehydes may be prepared by the careful oxidation of primary alcohols with a mixture of potassium dichromate and sulphuric acid,—3R•CH2OH+K2Cr207+4H2S03=K2S0,+ Cr2(SO.03+7H2O+3R•CHO; by distilling the calcium salts of the fatty acids with calcium formate; and by hydrolysis of the acetals. L. Bouveault (Bull. sac. shim., 1904 [31,31,p.1306) prepares aldehydes by the gradual addition of 'disubstituted formamides (dissolved in anhydrous ether) to magnesium alkyl haloids, the best yields being obtained by the use of diethyl formamide. Secondary reactions take place at the same time, yielding more particularly hydrocarbons of the paraffin series. G. Darzens (Comptes Rendus, 1904, 139, p. 1214) prepares. esters of disubstituted glycidic acids, by condensing the corresponding ketone with monochloracetic ester, in the presence of sodium ethylate. These esters on hydrolysis yield the free acids, which readily decompose, with loss of carbon dioxide and formation of an aldehyde, the manor-house.
End of Article: ALDBOROUGH

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