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 85
... fixed stars as other suns , each of them attended by their re- spective system of planets , to which they impart their in- fluence . We have brought our telescopes to such a de- gree of perfection , that from the appearances which the ...
... fixed stars as other suns , each of them attended by their re- spective system of planets , to which they impart their in- fluence . We have brought our telescopes to such a de- gree of perfection , that from the appearances which the ...
Page 86
... fixed star , the second a planet . Emily . But if the planets are worlds like our earth , they are dark bodies ; and instead of shining by night , we should see them only by day - light . And why do we not see the fixed stars also by ...
... fixed star , the second a planet . Emily . But if the planets are worlds like our earth , they are dark bodies ; and instead of shining by night , we should see them only by day - light . And why do we not see the fixed stars also by ...
Page 88
... stars shining , they cannot imagine why the planets , which are dark bodies , should shine , concluding , that since ... fixed star ? Mrs. B. No doubt , if the beings who inhabit those planets are endowed with senses similar to ...
... stars shining , they cannot imagine why the planets , which are dark bodies , should shine , concluding , that since ... fixed star ? Mrs. B. No doubt , if the beings who inhabit those planets are endowed with senses similar to ...
Page 92
... fixed stars , which only ap- pear to move . Mrs. B. The great distance of the planets renders their motion apparently so slow , that the eye is not sen- sible of their progress in their orbit , unless we watch them for some considerable ...
... fixed stars , which only ap- pear to move . Mrs. B. The great distance of the planets renders their motion apparently so slow , that the eye is not sen- sible of their progress in their orbit , unless we watch them for some considerable ...
Page 96
... fixed stars , which the. * Above 500 comets have appeared since the commencement of the Christian era ; and accounts of many more are extant ? 372. What are the comets supposed to be ? -373 . From what fact is it concluded that the ...
... fixed stars , which the. * Above 500 comets have appeared since the commencement of the Christian era ; and accounts of many more are extant ? 372. What are the comets supposed to be ? -373 . From what fact is it concluded that the ...
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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