SPOT ON THE SIN.
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Messrs. GooDwINs-Some of your readers may be sintcrested in knowing lhat there is large Spot on the Suns DISC, nearly ten thousand miles in di- ametcr. On Saturday, Nov. 3d, it Was quite distinctly marked, and ap- ncaied nearly circular; inthe morning Ii vas to be seen directly above the suns centre, nearly half way towards his western limb, fsdgc,)

 Spots are almost constantly 10 bc seen by the aid of the Telescope, though or- dlharily Lot many times in the year so large as thisohe. It tiswell knownthat tbc time of the suns revolution on it's axls was determined by aneais of these spots; the opinions of philosophers in regard to their cause and nature are various. Dr. Hcrschcl supposed them to be ruptures or openings il tic umin- GUS medium surrounding the sun, ind that through these openings we discover either less luminous stratum of clouds, or the opaque body of the sun lying be- yond, and with respect 10 the sun, ln- derneath the luminous medium.

 It may be observed, that it is not ne- eessary 10 consider these spots as per ieesis black; they indeed become so ny comparison with the rest of the suns disc; but these same portions of tho disc Ii detached from the rest, .and viewed with the intervention ofthe dark glasses, through which we are obliged to view the sun, might appear very bright, and it is highly probable that they often would. Dr. H's opinion re- celves strong confirmation from the diff ferent shapes of the spots, as they are presented 10 US in different relative parts, ofthe suns disc by his revolution. Their appearance changes often and nearly always in a few days, when ex- amined with a telescope. YIDl.

 Hartford, Conn. Nop. 6.