Nov 1882
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1882natur..27....4h&link_type=abstract
Nature, Volume 27, Issue 679, pp. 4-5 (1882).
Other
Scientific paper
I BEG that you will allow me space for a few lines of comment upon the letters and drawings of the comet in your last issue, my own included. While thanking the engraver for the generally accurate reproduction of my sketch, it is clear that wood-engraving scarcely admits of a perfect rendering of stumped shading. A few words of correction will serve all the purpose of preserving for possible future use the evidence which I wished to put on record. The chief defect is in the isolation given to the ``wisp,'' described by another correspondent as a ``horn.'' It seemed rather to be an inclined elongation of the brightest part. The inclination too is exaggerated its prolongation should have passed within the star on the northern1 border, but clear of the head. The only other alteration I should desire would he the strengthening of the brightness all along the middle or axis of the tail, and the smoothing away of all other features such as now seem indicated in the body of it, Trivial as these changes may seem, the ultimate value of the drawing, if it should ever have any, must depend on its accuracy. The feebleness of the feature which attracted my attention may at the same time be inferred from its absence in the adjoining contemporaneous sketch accompanying Mr. Seabroke's letter, while its reality is proved by the descriptions in the two letters which follow. As regards the ``rift'' or ``shadow,'' on which stress is laid by Mr. Williams at Cannes, one cannot help suspecting that this impression was the effect of contrast only-contrast between the complete absence of tail in that quarter, and the unrecognised presence of exceedingly feeble luminosity due to the extension and diffusion of cometic matter roundabout. It would require very strong evidence indeed to establish the real presence of shadow in the ordinary sense of that term.
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