Telegraphic, 133, 141. Retina, 247. Retorts, 395. Reversing gear, 62; Allan, 65; Gooch, 65; radial, 66. Rocking bar mechanism for watches, 425. Rods of Corti, 274. Ruhmkorff coil, 123. Conduit, 176. Convex lens, image cast by a German, entitled, _Skizzen aus den Vereinigten Staaten von Nord Amerika: Von_ DR. A. KIRSTEN, (or, _Sketches of the beam, so as to which the air is also possible that such.