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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Page 82
... orbit at B , the force of projection would carry it to D , which brings it nearer the sun instead of bearing it away from it . Emily . If , then , we are driven by one power and drawn by the other to this centre of destruction , how is ...
... orbit at B , the force of projection would carry it to D , which brings it nearer the sun instead of bearing it away from it . Emily . If , then , we are driven by one power and drawn by the other to this centre of destruction , how is ...
Page 83
... orbit , and how short they are in the other part ! Mrs. B. The inequality is not so considerable as appears in this figure ; for the earth's orbit is not so ec- centric as it is there described ; and , in reality differs but little from ...
... orbit , and how short they are in the other part ! Mrs. B. The inequality is not so considerable as appears in this figure ; for the earth's orbit is not so ec- centric as it is there described ; and , in reality differs but little from ...
Page 84
... orbit nearest the sun , it must have completed its journey through one half of its orbit in a shorter time than the other half ? Mrs. B. Yes , it is about seven days longer perform- ing the summer - half of its orbit , than the winter ...
... orbit nearest the sun , it must have completed its journey through one half of its orbit in a shorter time than the other half ? Mrs. B. Yes , it is about seven days longer perform- ing the summer - half of its orbit , than the winter ...
Page 86
... orbits more or less elliptical , according to the proportion which these two forces bear to each other . But the planets have also another motion ; they re- volvė upon their axes . The axis of a planet is an imag- inary line which ...
... orbits more or less elliptical , according to the proportion which these two forces bear to each other . But the planets have also another motion ; they re- volvė upon their axes . The axis of a planet is an imag- inary line which ...
Page 90
... orbits ; for their projectile force must be propor- tioned to that of attraction ? But I do not see how this accounts for the motion of the secondary round the pri- mary planets , in preference to the sun . sun . Emily . Is it not ...
... orbits ; for their projectile force must be propor- tioned to that of attraction ? But I do not see how this accounts for the motion of the secondary round the pri- mary planets , in preference to the sun . sun . Emily . Is it not ...
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Common terms and phrases
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