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according actual amount appear aqueous atmosphere body bright brilliancy calculated centre clouds compared conclusions consequence considerable constitution continuous corona corresponding course dark density depth described direction disc dissociated distance earth effect ejected envelope equal evidence exist experiments explanation fact flame force further gaseous gases gravitation greater heat hydrogen hypothesis increased iron irregular jets Jupiter land less light limits lower luminous Mars mass matter mean measured Mercury merely metals miles moon nearly nucleus observed occur orbits outer phenomena photosphere planet planetary polar portion position present pressure probably produce projected prominences quantity question radiations reach reference regarded regions respecting ring satellites Saturn says seen side solar solar atmosphere solid space spectroscope spectrum sphere spots sufficient sun's supposed surface telescopic temperature theoretical tion vapour varying Venus views visible whole zodiacal light
Page 46 - In this case, it is obvious that the plane of the circle of illumination would be perpendicular to a line drawn from the centre of the sun to the centre of the earth...
Page 96 - ... water. The exceedingly definite shape of these objects ; their exact similarity one to another ; and the way in which they lie across and athwart each other (except where they form a sort of bridge across a spot, in which case they seem to affect a common direction, that, namely, of the bridge itself), all these characters seem quite repugnant to the notion of their being of a vaporous, a cloudy, or of a fluid nature. Nothing remains but to consider them as separate and independent sheets, flakes,...
Page 210 - It would be a vain task to attempt to count the stars in one of these globular clusters. They are not to be reckoned by hundreds; and on a"\ rough calculation, grounded on the apparent intervals between them at the borders...
Page 135 - Lyrse is the type. The iron of Lenarto has no doubt come from such an atmosphere, in which hydrogen greatly prevailed. This meteorite may be looked upon as holding imprisoned within it, and bearing to us, the hydrogen of the stars.
Page 7 - ... and it may be deserving of consideration, whether, in any instance, a deficiency of such matter can be proved, and whether, from this source, any conclusive argument can be drawn in favour of ultimate atoms in general.
Page 209 - Jupiter. — In the spectrum of Jupiter, lines are seen, which indicate the existence of an absorptive atmosphere about this planet. In this diagram these lines are presented as they appeared when viewed simultaneously with the spectrum of the sky, which, at the time of observation, reflected the light of the setting sun. One strong band corresponds with some terrestrial atmospheric lines, and probably indicates the presence of vapors similar to those which are about the earth.
Page 97 - There is nothing which represents so faithfully this appearance as the slow subsidence of some flocculent chemical precipitates in a transparent fluid, when viewed perpendicularly from above: so faithfully, indeed, that it is hardly possible not to be impressed with the idea of a luminous medium intermixed, but not confounded, with a transparent and non-luminous atmosphere, either floating as clouds in our air, or pervading it in vast sheets and columns like flame, or the streamers of our northern...
Page 40 - Let us now suppose a modification of these conditions, viz., that the vessel containing the dissociated gases at the temperature of dissociation shall be surrounded with bodies cooler than itself, ie, capable of receiving more heat from it than they radiate towards it ; there would then take place just so much combustion as would set free the amount of heat required to maintain the temperature of the vessel at the...
Page 78 - The great mystery, however, is to conceive how so enormous a conflagration (if such it be) can be kept up. Every discovery in chemical science here leaves us completely at a loss, or rather, seems to remove farther the prospect of probable explanation.
Page 3 - ... Williams published his very ingenious work entitled The Fuel of the Sun, in which, apparently without any knowledge of what had been written before with regard to an interstellary medium, he attempts to find therein the source of solar heat — the " solary fuel " of Newton. To quote his own language, " the gaseous ocean in which we are immersed is but a portion of the infinite atmosphere that fills the whole solidity of space, that links together all the elements of the universe, and diffuses...