Philosophical instructor, or, Webster's elements of natural philosophy : subdivided into principles and illustrations ; intended for academies, medical schools, and the popular class-room (1824)
Eaton, Amos, 1776-1842, Webster, John, fl. 1804-1824 · Albany : Printed by Websters and Skinners ... · leaf 82
tubes, fastened to theirheads ; these caps have circular glasses in front, togive light; and the end of the flexible tube is kept inthe bell, to supply the divers with air, whilst they fixtackles to those bodies that are to be raised. Thebell is supplied with air during the whole operation,by… … 80 DIVING BELL. the end, is fixed to the top of the barrel, so that wfaeuit has reached the side of the machine, the tuhe maybe drawn in, and the cock turned, to admit the air intothe bell; which is instantly effected by the greatpressure of the water upon the air in the open part ofthe barrel; so…
Physics
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