An Introduction to Natural Philosophy: Illustrated with Copper Plates, Volume 1J. Johnson, 1805 |
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Page 2
... quantities and pofitions of magnitudes . For this reafon , it will be difficult to give an example without having recourfe to the ma- thematics . The following will , however , be easily understood . Fig . 1. Let the two circles in the ...
... quantities and pofitions of magnitudes . For this reafon , it will be difficult to give an example without having recourfe to the ma- thematics . The following will , however , be easily understood . Fig . 1. Let the two circles in the ...
Page 10
... quantity of matter , how fmall foever , and any finite space , how great foever , being given ( as for example , a cube circumfcribed about the orb of Saturn ) it is poffible for the fmall quantity . of matter to be diffused throughout ...
... quantity of matter , how fmall foever , and any finite space , how great foever , being given ( as for example , a cube circumfcribed about the orb of Saturn ) it is poffible for the fmall quantity . of matter to be diffused throughout ...
Page 11
... quantities of matter may be unequal in any proportion ; yet the fum of their pores , or quan- tity of void space in each of the two bodies , fhall be nearly in the proportion of equality to each other . This is not fo obvious as the ...
... quantities of matter may be unequal in any proportion ; yet the fum of their pores , or quan- tity of void space in each of the two bodies , fhall be nearly in the proportion of equality to each other . This is not fo obvious as the ...
Page 12
... quantities of gold and filver , and the dimensions of the wire , are known . With thefe data it is eafy to calculate ... quantity of filver- wire fufficient to circumfcribe the whole globe of the earth . The animalculæ obferved in the ...
... quantities of gold and filver , and the dimensions of the wire , are known . With thefe data it is eafy to calculate ... quantity of filver- wire fufficient to circumfcribe the whole globe of the earth . The animalculæ obferved in the ...
Page 17
... quantity of matter in the universe is much o lefs than is generally imagined . This truth may be deduced from what has been faid already on this fubject ; but more especially from the properties of transparent bodies . Light paffes ...
... quantity of matter in the universe is much o lefs than is generally imagined . This truth may be deduced from what has been faid already on this fubject ; but more especially from the properties of transparent bodies . Light paffes ...
Other editions - View all
An Introduction to Natural Philosophy, Vol. 1 of 2: Illustrated With Copper ... William Nicholson No preview available - 2017 |
An Introduction to Natural Philosophy, Vol. 2 of 2: Illustrated With ... William Nicholson No preview available - 2016 |
Common terms and phrases
alfo alſo angle apfides appear axis becauſe bodies cafe caufes cauſe centripetal force circle colours confequently confiderable conjunction courſe deſcribed diameter diminiſhed direction diſtance Earth ecliptic elongation equal faid fame fecond feen fhadow fhewn fhould fide fimilar fince firft firſt fituated fixed ftars fmall fome fquare fuch fufficient fuppofed furface glaſs gravity greater greateſt inclined plane increaſe inferior planet inftant inftruments interfecting inverſely itſelf Jupiter laft laſt lefs leſs likewife mafs maſs meaſure Moon Moon's moſt motion move muft muſt node obferved occafion oppofition orbit paffes paffing parallax parallel paſs perpendicular planet pofition proportion purpoſe quadratures quantity ratio rays of light reaſon reflection refraction refrangible reft repreſent retrograde motion revolution revolve Saturn ſeen ſhall ſmall ſpace ſquare ſtars Sun's ſuppoſed teleſcope thefe theſe thofe thoſe tion uſed velocity Venus weight Whence whofe whoſe
Popular passages
Page 301 - Boyle] as when it is adjacent to it. Secondly, If Light in its paflage out of Glafs into Air be incident more obliquely than at an Angle of 40 or 4 1 Degrees it is wholly reflected, if lefs obliquely it is in great meafure tranfmitted.
Page 287 - ... hot; that the vibrations thus excited are propagated in the refracting or reflecting medium or substance, much after the manner that vibrations are propagated in the air for causing sound, and move faster than the rays so as to overtake them; and that when any ray is in that part of the vibration which conspires with its motion, it easily breaks through a refracting surface, but when it is in the contrary part of the vibration which impedes its motion, it is easily reflected...
Page 276 - Thus (hall there be made two Bows of Colours, an interior and ftronger, by one reflexion in the Drops, and an exterior and fainter by two ; for the Light becomes fainter by every reflexion.
Page 276 - F, and ftrike the fenfes with the intermediate Colours in the order which their degrees of refrangibility require , that is, in the progrefs from...
Page 304 - fmall to be vifible. And therefore, if light were " reflected by impinging on the folid parts of the " glafs, it would be fcattered as much by the moft *' polifhed glafs, as by the rougheft. So then it re...
Page 275 - Eye, and thereby ftrike the fenfes with the deepeft violet Colour in that region. And in like manner the Angle SFO being equal ta the Angle P OF, or 42 deg.
Page 292 - Feathers of fome Birds, and particularly thofe of Peacocks Tails, do, in the very fame part of the Feather, appear of feveral Colours in feveral Pofitions of the Eye, after the very fame manner that thin Plates...
Page 269 - The instance of the separation of the primary colours of light, which seems most remarkable, is that of the RAINBOW. It is formed, in general, by the reflection of the rays of the sun's light from the drops of falling rain, though frequently it appears among the waves of the sea, whose heads, or tops, are blown by the wind into small drops, and it is sometimes seen on the ground, when the sun shines on a very thick dew.
Page 301 - Room be fucceffively caft on a fecond Prifm placed at a greater diftance from the former, in fuch -manner that they are all alike incident upon it, the fecond Prifm may be fo inclined to the incident Rays, that thofe which are of a blue Colour fhall be all reflected by it, and yet thofe of a red Colour pretty copioufly tranfmitted. Now if the...
Page 304 - Ray is effected, not by a single point of the reflecting Body, but by some power of the Body which is evenly diffused all over its Surface, and by which it acts upon the Ray without immediate Contact.