Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 311
Fig. 8 rotator, is made to revolve by four curved blades as the logis drawn through the water; the forward part is kept fromrevolving by two straight blades, and contains a registeringapparatus connected with the rotator, which shows the distance. … Fig. 9 The Patent Taffrail Log, one form of which is shown inFig. 9, consists of a registering apparatus which is perma-nently attached to the taffrail of the vessel, and a rotator THE L(Xi 323 which is towed through the water by a cord connected withthe register. The revolutions of the rotator are…
Trigonometry · Surveying · Navigation
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
