What people are saying - Write a review
We haven't found any reviews in the usual places.
Other editions - View all
adhesion angle atoms attraction axle ball becomes buoyant force cause centre of gravity centrifugal force chemical cohesion colors condensed conductor convex convex lens copper cord crystalline lens cubic cubic foot cylinder Describe diameter direction distance drop earth elastic electricity energy equal filled float force friction gases glass tube gutta-percha heat illustrate inches inclined plane inverted iron Law of Equilibrium length lens lever Leyden jar lift liquid magnet matter mercury metal miles mirror molecules motion move Natural Philosophy needle number of vibrations object particles pass pendulum Physics piston placed polarized pole pressure principle produced pulley rays of light reflected refracted revolve rise shown in Fig solid sound sound-wave specific gravity square steam stone strike string substance surface temperature theory tricity upward vacuum vapor velocity velocity of sound vessel waves weight wheel wind wire zinc
Page 52 - that every particle of matter in the universe attracts every other particle, with a force whose direction is that of the line joining the two, and whose magnitude is directly as the product of their masses, and inversely as the square of their distances from each other.
Page 23 - Hebrews was the length of the forearm from the elbow to the end of the middle finger; and the smaller scriptural dimensions are expressed in hand-breadths and spans.
Page 14 - Thus a molecule of hydrogen is believed to be made up of two atoms of hydrogen ; while a molecule of water is made up of two atoms of hydrogen and one of oxygen.
Page 93 - This proves that a body in water is buoyed up by a force equal to the weight of the water it displaces.
Page 254 - To matter or to force The All is not confined ; Beside the law of things Is set the law of mind ; One speaks in rock and star, And one within the brain, In unison at times, And then apart again; And both in one have brought us hither That we may know our whence and whither.
Page 117 - Archimedes' principle, that a body immersed in water is buoyed up by a force equal to the weight of the water displaced by the body.
Page 254 - Tis only through the soul That aught we know is known : — With equal voice she tells Of what we touch and see Within these bounds of life, And of a life to be ; Proclaiming One who brought us hither, And holds the keys of whence and whither.
Page 146 - Pythagoras, who lived in the 6th century before Christ, conceived that the celestial spheres are separated from each other by intervals corresponding with the relative lengths of strings arranged to produce harmonious tones. In his musical investigations he used a monochord, the original of the sonometer now employed by physicists, and wished that instrument to be engraved on his tomb. Pythagoras held that the musical intervals depend on mathematics ; while his great rival, Aristoxenes, claimed that...
Page 121 - Scientific education ought to teach us to see the invisible as well as the visible in nature ; to picture with the eye of the mind those operations which entirely elude the eye of the body ; to look at the very atoms of matter in motion and at rest, and to follow them forth, without ever once losing sight of them, into the world of the senses, and see them there integrating themselves in natural phenomena.