Irving, [Christopher], d. 1856. [from old catalog], Ortmann, Anselm. [from old catalog] · Baltimore, Md., New York, J. Murphy company · leaf 94
e smoke from a locomotive in theair, it is evident that a comet will be graduallydisintegrated by repeated visits to the sun. Q. 20. What is the size of the heads of comets ?A. The heads of comets range from less than 10,000miles in diameter to over 1,000,000. Q. 21. What are the dimensions of a… … Fig. 20. Naked-eye View of Donatis Comet, Oct. 4, 1858. COMETS. 75 Q. 22. Do the comets contain much mass ? A. Comets which have come near to the earth havehad their periods changed to the extent of severalweeks on account of the earths attracting mass, butthe period of the earths revolution, i.…
Astronomy
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