Lectures on Experimental Philosophy, Astronomy, and Chemistry: Intended Chiefly for the Use of Students and Young Persons, Volume 2Longman, 1820 - Astronomy |
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Page 5
... mean or equal time . The difference between mean and solar time depends upon three causes . 1st , The earth ( according to the third law o Kepler ) does not pass equal portions of its orbit in equal times . It proceeds sometimes quicker ...
... mean or equal time . The difference between mean and solar time depends upon three causes . 1st , The earth ( according to the third law o Kepler ) does not pass equal portions of its orbit in equal times . It proceeds sometimes quicker ...
Page 9
... mean time . These are also given for the noon of every day in the year , in the Nautical Almanac , the Con- naissance des Tems , Bode's Jahrbuch , and White's Ephemeris ; and for every fifth day , in the Ladies ' and Gentleman's Diaries ...
... mean time . These are also given for the noon of every day in the year , in the Nautical Almanac , the Con- naissance des Tems , Bode's Jahrbuch , and White's Ephemeris ; and for every fifth day , in the Ladies ' and Gentleman's Diaries ...
Page 15
... mean solar month , that is , the time in which the sun appears to traverse one sign , or twelfth part of the zodiac . The actual lengths , however , vary , by reason of the earth's variable motion in different parts of its elliptical ...
... mean solar month , that is , the time in which the sun appears to traverse one sign , or twelfth part of the zodiac . The actual lengths , however , vary , by reason of the earth's variable motion in different parts of its elliptical ...
Page 25
... mean lunations , or about eighteen years and ten days , so that the same node which was in con- * Bonnycastle's Astronomy , lett . xxii . + Ibid . VOL . II . junction with the sun and moon at the beginning of Eclipses . 25.
... mean lunations , or about eighteen years and ten days , so that the same node which was in con- * Bonnycastle's Astronomy , lett . xxii . + Ibid . VOL . II . junction with the sun and moon at the beginning of Eclipses . 25.
Page 26
... mean conjunctions and oppositions that will occur in every year , and the true places of the sun and moon in their orbits at each of those times . And , if from this it appears that the two luminaries are within the proper limits of the ...
... mean conjunctions and oppositions that will occur in every year , and the true places of the sun and moon in their orbits at each of those times . And , if from this it appears that the two luminaries are within the proper limits of the ...
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Lectures on Experimental Philosophy, Astronomy, and Chemistry ..., Volume 1 G. (George) Gregory No preview available - 2012 |
Lectures on Experimental Philosophy, Astronomy, and Chemistry: Intended ... No preview available - 2019 |
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acid gas alkali alum ammonia animal appears applied atmosphere attraction for water becomes bodies boiling burning called caloric carbonat carbonic acid carbonic acid gas charcoal chemical chemistry chemists clay cold colour combined combustible compound condensed contain converted into vapour copper crystals degree of heat deliquescent dissolved distillation earth eclipse effect effervescence equator evaporation exposed fire flame fluid fluidity freezing furnace fusion glass Hence hydrogen hydrogen gas iron lecture lime liquor magnesia matter melted mercury metals mineral waters mixed mixture moon mucilage muriatic acid nitrat nitric acid nitrogen node obtained orbit oxide oxygen oxygen gas particles phænomenon phosphorus portion potass powder precipitated produced proportion pure resins rises saltpetre saturated sensible heat separated silver small quantity smell soda solid solution sometimes specific gravity spirit of wine stances strata strong substances sulphat sulphuric acid surface tains temperature tion transparent vegetable vessel volatile alkali
Popular passages
Page 1 - ... to the inclination of the axis of the earth to the plane of the ecliptic, and partly to the different positions in which a spectator is placed in different zones of the globe.
Page 22 - An eclipse of the sun can only take place when the moon is in conjunction with the sun, and when she is in one of her nodes, or very near it. Suppose the line EE (fig. 8) to be a portion of the ecliptic, and LL a portion of the orbit of the moon, cutting the ecliptic in the point N, at an angle of a little more than five degrees. Then, if in the moment of her conjunction the moon is found in the point F of her orbit, she will be too far from her node to intercept the sun's light, and cause an eclipse.
Page 86 - ... to combine with the oxygen of the atmosphere, and this oxygen during its combination lets go the caloric with which in the state of air or gas it was combined.
Page 86 - It is of course incombustible, because; its base being already saturated with oxygen, cannot combine with any more.
Page 26 - But the falling back of the line of conjunctions, or oppositions of the sun and moon 28' 12", with respect to the line of the nodes in every period, will wear it out in process of time; and after that it will not return again in less than 12,493 years.
Page 246 - When a sheet of pure tin is immersed in a solution of nitro-muriate of gold, the oxide of gold is precipitated of a purple colour; and, when scraped off and collected, forms the purple powder of Cassius, much employed in enamelling.
Page 25 - ... 225 days; in which time there would always be a regular period of eclipses, if any complete number of lunations were finished without a fraction. But this never happens ; for if both the Sun and Moon should start from a line of conjunction with either of the nodes in any point of the ecliptic, the Sun would perform 18 annual revolutions and 222 degrees over and above, and the Moon 230 lunations and 85...