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 13
... manner already stated . The duration of twilight is not the same at all places , nor even at the same place in all sea- sons ; since , at certain places , and at certain times , the sun rises and descends perpendicularly from the ...
... manner already stated . The duration of twilight is not the same at all places , nor even at the same place in all sea- sons ; since , at certain places , and at certain times , the sun rises and descends perpendicularly from the ...
Page 18
... manner as you might expect on a cursory view of the figure . If the plane of the moon's orbit were perfectly coincident with that of the earth , what we have been supposing would actually take place , and there would be a total eclipse ...
... manner as you might expect on a cursory view of the figure . If the plane of the moon's orbit were perfectly coincident with that of the earth , what we have been supposing would actually take place , and there would be a total eclipse ...
Page 30
... manner as in the former position of the several bodies . Before the opposi- tions of Jupiter to the sun , the immersions and emersions happen to the west of Jupiter ; after opposition they happen to the east . If an astro- nomical ...
... manner as in the former position of the several bodies . Before the opposi- tions of Jupiter to the sun , the immersions and emersions happen to the west of Jupiter ; after opposition they happen to the east . If an astro- nomical ...
Page 34
... manner , particularly as to the nature of their constituent parts . It is one of the great uses of philosophy to make us better acquainted with an intelligent Providence , to show how wisely and with what infinite design all things in ...
... manner , particularly as to the nature of their constituent parts . It is one of the great uses of philosophy to make us better acquainted with an intelligent Providence , to show how wisely and with what infinite design all things in ...
Page 62
... manner a cold body introduced into a warm place soon acquires the temperature of that place . The distribution of heat is more rapid in proportion to the contact of parts ; hence the excessive slowness with which heat is communi- cated ...
... manner a cold body introduced into a warm place soon acquires the temperature of that place . The distribution of heat is more rapid in proportion to the contact of parts ; hence the excessive slowness with which heat is communi- cated ...
Other editions - View all
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 |
Common terms and phrases
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...