Conversations on Natural Philosophy: In which the Elements of that Science are Familiarly Explained, and Adapted to the Comprehension of Young Pupils. Illustrated with Plates |
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angle appear astronomy atmosphere attraction of cohesion axis ball called camera obscura Caroline centre of gravity centrifugal force circle cohesive attraction concave mirror consequently convex mirror dark degrees diminished direction distance diurnal motion earth eclipse effect elastic Emily equal equator explain figure fixed stars fluid focus force fulcrum geometry glass globe greater heat illustrated lens less lever liquids mechanical power mercury meridian moon motion move Natural Philosophy nature object obliquely observe opaque body opposite orbit particles pass pendulum perpendicular planets plate poles pressure produced proportion pulley pump rays fall rays of light reflected rays reflecting telescope refraction represents resistance retina revolve round right line rise round the sun shadow shines side situated solar solid bodies sonorous body sound space specific gravity sphere spring sun's rays suppose surface tides tion tube understand vapor velocity vibrations weight whilst wind