Millikan, Robert Andrews, Gale, Henry Gordon · Boston : Ginn and Co. · leaf 36
th the surface, or, if submerged, brings her to the surface, so that she canscan the horizon with her periscope. The whole operation takes but a few seconds.When the submarine wishes to come to the surface for recharging her batteriesor for other purposes, she blows compressed air into her ballast… … Fig. 19. Method of finding specificgravity of a liglit solid 31. Specific gravity of a solid lighter than water. If thebody is too liglit to sink of itself, we may still obtain theweight of the equal volumeof water by f orcmg it beneaththe surface with a sinker.Thus, suppose fv^ representsthe…
Physics
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