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action angle angle of incidence aperture arises atmospheric air attraction axis ball bodies bulb center of gravity circumstances colors concave convex convex lens cylinder density descend Describe determined diameter direction distance earth ecliptic effect elastic force electricity Endosmosis equal equilibrium fall gases give rise glass heat horizon hydrometer illustration inclined plane instrument intensity inversely LECTURE length lens lever liquid machine magnet mass mercury metal mirror moon motion move Natural Philosophy needle object opposite orbit parallax parallelogram of forces particles pass path pendulum phenomena piston plate polar poles position pressure principle prism proved pulley quantity quicksilver reflected reflecting telescope reflexion refraction represented in Fig resistance rotation round screw Sheep extra solar solid sound specific gravity spherical star substances surface takes place telescope temperature theory thermometer tion tube velocity vertical vibrations voltaic wave weight wire
Page 3 - Two bodies cannot occupy the same space at the same time. If the...