The principles of light and color: including among other things the harmonic laws of the universe, the etherio-atomic philosophy of force, chromo chemistry, chromo therapeutics, and the general philosophy of the fine forces, together with numerous discoveries and practical applications .. . re generally seen it not evident that these masses of partially opaque matter arethe clouds of substance thrown up for some time in continuousluminous columns which we call iacuke, and that these clouds, byreaching the upper atmosphere, become cooled off and conse-quently dark ? Is not the fac
The principles of light and color: including among other things the harmonic laws of the universe, the etherio-atomic philosophy of force, chromo chemistry, chromo therapeutics, and the general philosophy of the fine forces, together with numerous discoveries and practical applications .. . re generally seen it not evident that these masses of partially opaque matter arethe clouds of substance thrown up for some time in continuousluminous columns which we call iacuke, and that these clouds, byreaching the upper atmosphere, become cooled off and conse-quently dark ? Is not the fact that they float along the sunsdisc with a gradually descending motion proof that they havebecome condensed by the cold, and so are carried downward bytheir own gravity? Lockyer describes a cloud of incandescentmagnesium that he saw floating high above a prominence, andthe whole phenomena of these faculae and maculae seem easy ofexplanation by inductions which we may draw from the revela-tions of the spectroscope. 2. When viewed with a telescope the sun is observed to bemottled over its whole surface with small dots or pores whichwhen carefully watched are seen to be in a constant state ofchange. These are probably smaller masses of vaporous matter AND SPOTS ON THE SUN. 189. Fig. 157. Comparative sizes of the Sun and Planets after Guillemin, with a view of some ofthe spots and mottled appearance of sun. which have risen upward and become cooled and darkened, andwhich then by their increased density sink again to becomeheated and rarified before going through the same process. 11- n ? ?.XZ- * ,*2 190 THE SOURCES OF LIGHT. XIII. Solar Statistics. Some of the following statistics are given according to , the well known astronomer of Dartmouth College, andothers are in harmony with the figures of general astronomicalscience. The diameter of the sun 860,000 miles ; size 1,280,000Umes that of the earth ; average density, one-fourth that of theearth ; Weight o
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