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 angle of incidence appear astronomy atmosphere axis ball called camera obscura Caroline centre of gravity centrifugal force circle cohesive attraction concave mirror consequently convex convex mirror dark degrees diminished direction distance diurnal motion earth eclipse ecliptick effect elastick electricity Emily equal equator explain figure fixed stars fluid focus force fulcrum geometry glass globe greater heat humour illustrate lens less lever liquids luminous machine mechanicks mercury meridian metals moon motion move Natural Philosophy nature object obliquely observe opaque body opposite opticks orbit particles pass perpendicular planets plate poles pressure produced proportion pulley pump rays fall rays of light reflected rays refraction represents resistance retina right line rise round the sun shadow shines situated solar solid bodies sound space specifick gravity sphere spring substances sun's rays suppose surface tides tion tube understand vapour velocity vibrations weight whilst wind zodiack
Popular passages
Page 93 - ... all things clad; Silence accompanied; for beast and bird, They to their grassy couch, these to their nests Were slunk, all but .the wakeful nightingale; She all night long her amorous descant sung; Silence was pleased: now...
Page 105 - evidence of things not seen," in the fulness of Divine grace ; and was profound on this, the greatest concern of human life, while unable even to comprehend how the " inclination of the earth's axis to the plane of its orbit" could be the cause of the change of the seasons.
Page i - ON NATURAL PHILOSOPHY ; In which the Elements of that Science are familiarly explained, and adapted to the comprehension of Young Persons.
Page 93 - Now came still evening on, and twilight gray Had in her sober livery all things clad ; Silence accompanied ; for beast and bird, They to their grassy couch, these to their nests, Were slunk, all but the wakeful nightingale, She all night long her amorous descant sung...
Page ii - States entitled an act for the encouragement of learning hy securing the copies of maps, charts and books to the author., and proprietors of such copies during the times therein mentioned, and also to an act entitled an act supplementary to an act, entitled an act for the encouragement of learning by securing the copies of maps, charts and books to the authors and proprietors of such copies during the times therein mentioned and extending the benefits thereof to the arts of designing, engraving and...
Page 72 - ... time that the axle describes a small one, therefore the power is increased in the same proportion as the circumference of the wheel is greater than that of the axle. If the...