Conversations on Natural Philosophy: In which the Elements of that Science are Familiarly Explained and Adapted to the Comprehension of Young PupilsPublished and sold by J. Grigg ..., and by W.P. Bason, Charleston, S.C., 1824 - 236 من الصفحات |
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angle appear atmosphere attraction of cohesion axis ball called camera obscura Caroline centre of gravity centrifugal force circle coloured rays concave mirror consequently convex cricket ball crystalline humour dark degrees dimensions diminished direction distance diurnal motion draw earth eclipse effect elastic Emily equal equator equilibrium fixed stars fluid focus fulcrum glass globe greater heat heavier lens less lever lighter liquid mechanical power mercury meridian moon move nature nearer object observe opaque body opposite orbit particles passes perfectly perpendicular planets plate polar circles pole Pray pressure proceed produced proportion pulley pump quantity of matter rays fall rays of light reflected rays refracting telescope refraction represent resistance retina rise round the sun shadow shine situated solid bodies sonorous body space specific gravity string sun's rays suppose surface tion true tube understand vapour velocity vibrations weight wheel whilst wind