Well's natural philosophy : for the use of schools, academies and privte students, introducing the latest results of scientific discovery and research ; arranged with special reference to the practical application of physical science to the arts and the experiences of everyday life ; with three hundred and seventy-five engravings (1873)
Wells, David A · New York : Ivison, Blakeman, Taylor and Co. · leaf 430
under side of the card, in such a way that both traverse together—the needle itself being out of sight. Upon the surface of the card is engraved a radiating diagram, dividmg the whole circle of the horizon into thirty-two parts, called points. The compass-box is supported by means of two concentric… … may roll or lurch, the card is al- FiG 355. ways in a horizontal position, and is certain to point the true direction of the head of the ship. Fig. 355 represents the construc« tion and mounting of the Sea Compass. 797. If asimple bar of unmagnetized steel,or an ordinary needlebe suspended from…
Physics · Science · Technology
Internet Archive · University of Toronto Libraries · Public Domain Mark 1.0. Free to use for anything.
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