The seven follies of science; a popular account of the most famous scientific impossibilities and the attempts which have been made to solve them. To which is added a small budget of interesting paradoxes, illusions, and marvels (1906)
Phin, John, 1830-1913 · New York, D. Van Nostrand company · leaf 63
THE SEVEN FOLLIES OF SCIENCE 52 He then suggests some difficulties which the ball, seen just under the letter E, is intended to overcome, but he confesses that he has never tried it, and to any practical mechanic it is very obvious that the machine will not work. … But we give the description in the language of the inventor, as a fair type of this class of perpetual-motion machines. In the year 1790 a Doctor Schweirs took out a patent for a machine in which small metal balls were used instead of a liquid, and they were raised by a sort of chain pump which…
Scientific recreations · Geometry
Internet Archive · Cornell University Library · Public domain (published before 1931). Free to use for anything.
