The Observatory Volume 6; V. 75-77

The Observatory Volume 6; V. 75-77

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1883 edition. Excerpt: ... or add to, what professes to be a quotation from Ball's own letter. It is true that Prof. Adams adduces a small sketch (with description) of Saturn as observed by Ball in April 1666, which shows no trace of any such notches or depressions as those depicted in the previous October, and is unaccompanied by any remark about a different appearance then presented. But surely this would be sufficiently accounted for by the supposition that the engraver considerably exaggerated the hollownesses of which Ball may have thought he saw indications in October 1665. The drawing in April 1666 is too small and rough for any decided opinion about the total absence of such even then. Ball at the later time had not seen the engraving of his former drawing; and I think his language does seem to imply some change in the apparent figure of the ring: --"what his figure was last autumn I suppose Sir R. Moray hath communicated." Prof. Adams supposes that the erroneous figure in the engraving was soon discovered, and that an effort was made to conceal it by cutting out the plate containing it-, reengraving in a subsequent plate the only other two figures on the one in question; this, he thinks, accounts for the plate with the erroneous figure being found in a few copies only of the 'Transactions.' But surely, if this were so, it would have been a very strange way of cancelling a plate, simply to cut it out of all the copies within reach, without a word of explanation to account for the erroneous description still remaining, which Prof. Adams thinks was written, not by Ball, but by some one inexperienced in astronomical observations, for the express purpose of corresponding with the figure. Moreover, I must remark that Prof. Adams seems to have...show more

Product details

  • Paperback | 164 pages
  • 189 x 246 x 9mm | 304g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236748727
  • 9781236748720