e electro-magnet, E, is and the most impulsive. In a fortnight one can learn a wheel, A, of soft: iron, provided with teeth on its cir to read the printed characters, while it takes six cumference, and having on its axis a wooden box filled months’ practice td become a rapid operator. with mercury… … prises a set of similar apparatus, nets which work the dies. Thus Fig. 3—-THE TRANSMITTER. and if the two wheels have the each key is put in electrical con- same number of teeth, and the nection with the corresponding per rolled upon G and passing under the dies. The tuning forks have been…
Internet Archive · Public domain (published before 1931). Free to use for anything.
