Letters on natural magic, addressed to Sir Walter Scott (1832)
Brewster, David, 1781-1868 · London : John Murray · leaf 188
164 LETTERS ON NATURAL MAGIC. fleeted from the mouth of the trumpet back to the aperture at A, in the horizontal rail, Fig-. 38, and Fig. 39. … was distinctly conveyed along the closed tube in- to the apartment N. In like manner the answer issued from the aperture A, and being reflected back to the ear of the spectator by the trumpet, he heard the sounds with that change of character which they receive when transmitted through a tube and…
Scientific recreations · Magic
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Wedding's Basic Bessemer Process. Translated [from the supplement to the author's Darstellung des schmiedbaren Eisens” entitled, “Basische Bessemer oder Thomas Process”] ... by W. B. Phillips ... and E. Prochaska ... With a supplementary chapter on dephosphorization in the basic open-hearth furnace, by E. Prochaska (1891)](https://img.insideoutlibrary.com/img/200/bl-bl_003874923_0-103-1.webp)
