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Show 7.qitoi 7iIIIam YaIl2iicc,:.K:tcd IJattcmatical Prodljy, IiDcai ; , . . r ' -Y7.- TRENTON, N. J., April 11Wllliam Vallance, the famous lightning, calcu-' latoi. who could do any sum in mathematical math-ematical calculation mentally and with but an - Instant's hesitation, is dead, aged 30 years. Vallance could duplicate the feats of ' any of the lightning calculators and them beat them all by artatlng Instantly any desired date in history. He could not teU how he knew history, but would' rattle off fact after fact. without ever making a mistake. . He could give instant answer to such arithmetical questions aa multiply 389,-, 389,-, 4S7. by 4641. Feats in algebra were his V- delight. ' . |