Desaguliers doubts the veracity of this bottle story, and we may well agree with him, when we find that in another version the discovery is attributed to a tobacco-pipe. He proceeds:--“Captain Savery made a great many experiments to bring this machine to perfection, and did erect several, which raised water very well for gentlemen’s seats; but could not succeed for mines, or supplying towns, where the water was to be raised very high, and in great quantities: for then the steam required being boiled up to such a strength, as to be ready to tear all the vessels to pieces. I have known Captain Savery, at York-Buildings, make steam eight or ten times stronger than common air; and then its heat was so great, that it would melt common soft solder; and its strength so great as to blow open several of the joints of his machine: so that he was forced to be at the pains and charge to have all his joints soldered with spelter or hard solder.”--Pp. 464–467. The serious accusation made against Savery of deriving all his information from the Marquis of Worcester’s invention, and destroying all he could procure relating to the Marquis, rests solely on the authority of Desaguliers, to whom it was related by one of Savery’s friends! In 1699, the Marquis’s Act had yet 63 years unexpired, had the Duke of Beaufort felt disposed to investigate how far Savery’s engine interfered with his father’s invention; but no such interest was excited, nor had Savery at any time so much success as to induce such an inquiry. But, in 1699, the Marquis had only been dead 32 years, and we have proof that his engine was in existence in 1670, reducing the space of time to 29 years; by no means an unlikely period for Savery to find parts of the large engine, or models of a small one, or drawings, or MS. descriptions, or verbal details from eye-witnesses, from among some of the many visitants to Vauxhall, if, indeed, not directly from descendants of the “incomparable workman,” Kaltoff. Savery’s connection with the mining interests of the country would appear to have first drawn his attention to the value of a scheme, proposing to raise vast bodies of water by the aid of a most stupendous power. He might, when a mere youth, have heard enough of the Marquis’s invention, however vaguely communicated, to excite his curiosity, and decide him on a course of action whenever an opportunity should occur.