American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 61
e made of solid coal, hewould burn entirely out in less than 6,000years. And now come such questions, asthese : What maintains this tremendous fur-nace ; what is its fuel; for how many ages hasit blazed as now, and when, if ever, will comethe day of its extinction ? I cannot answer anyof them, nor… … The subjoined cut (Fig. 1) will serve to ex-plain the names given to the different portionsof the sun. The space between the two innerlines is called the photosphere; betweenthose lines and the ragged one is the chromo- sphere. The radiating portion outside of allis the corona. Of the various…
Clocks and watches
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