The Earth: Its Shape, Size, Weight and SpinUniversity Press, 1922 - 141 pagine |
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69 miles angle apparatus attracted masses attracting spheres axis base-line beam body bulge calculated Cavendish Cavendish experiment centre of gravity circles round clock common centre deflection diameter direction disc distance due north Earth and Moon earth-pull Earth's surface effect equal equator equatorial exactly experiment feet fixed stars flat Earth force friction George Darwin globe greater gyroscope inch latitude length Let us suppose Lough Foyle mean density measured ment meridian method million Moon Moon's motion mountain move round nearer nearly Newton observed once in 24 opposite orbit Ordnance Survey pans pendulum perpendicular plane plumb line point of Aries pole height pole star position pound proportional pull radius rotation round the Sun Sandwick Schiehallion seen side sky pole speed spin round station steamer swing telescope temperature theodolite tides tilt torsion balance torsion rod triangle velocity vertical vibration weight wind wire zenith