Watt describes, as his hobby, a _machine to copy sculpture_, suggested to him by an implement he had seen and admired in Paris in 1802, where it was used for tracing and multiplying the dies of medals. He foresaw the possibility of enlarging its powers so as to make it capable of working even on wood and marble, to do for solid masses and in hard materials what his copying machine of 1782 had already done for drawings and writings impressed upon flat surfaces of paper--to produce, in fact, a perfect fac-simile of the original model. He worked at this machine most assiduously, and his "likeness lathe," as he termed it, was set up in a garret, which, with all its mysterious contents, its tools, and models included, have been carefully preserved as he left them. It is gratifying to find that the charm of Watt's presence was not dimmed by age. "His friends," says Lord Jeffrey, speaking of a visit which he paid to Scotland when upward of eighty, "in that part of the country never saw him more full of intellectual vigor and colloquial animation, never more delightful or more instructive." It was then also that Sir Walter Scott, meeting him "surrounded by a little band of northern literati," saw and heard what he felt he was never to see or hear again--"the alert, kind, benevolent old man, his talents and fancy overflowing on every subject, with his attention alive to everyone's question his information at everyone's command." Campbell, the poet, who saw him later, in the beginning of 1819 (he was then eighty-three), describes him as so full of anecdote, that he spent one of the most amusing days he had ever had with him. Lord Brougham, later still, in the summer of the same year, found his instructive conversation and his lively and even playful manner unchanged. But in the autumn of this year, on August 19th, he expired tranquilly at his house at Heathfield. He was buried at Handsworth. A tribute to his memory was but tardily rendered by the nation. Jeffrey and Arago added more elaborate tributes to Watt's genius; and Wordsworth has declared that he looked upon him, considering his magnitude and universality, "as perhaps the most extraordinary man that this country has ever produced." His noblest monument is, however, his own work. DR. EDWARD JENNER By JOHN TIMBS, F.S.A. (1749-1823) [Illustration: Dr. Edward Jenner.] Few of the many thousand ills which human flesh is heir to, have spread such devastation among the family of man as small-pox. Its universality has ranged from the untold tribes of savages to the silken baron of civilization; and its ravages on life and beauty have been shown in many a sad tale of domestic suffering. To stay the destroying hand of such a scourge, which by some has been identified with the Plague of Athens, was reserved for Edward Jenner, the discoverer of vaccination.