Wrinkles in Practical Navigation

Wrinkles in Practical Navigation

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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. 1899 edition. Excerpt: ...and distant from each other 22?. It happens that this is also its exact distance from Betelguese. A lino from Schedar carried 31l beyond ll/irfack will fetch Nat/1: all three are in a perfectly straight line. A line joining Bellatria: and Polaris will pass through Nath, and a little eastward of Capella. This is a red star, and, after the manner of Altair, lies between two fainter ones; but in this case the three are bow-shaped. The bow points to a larger one close by to the north-westward. Their respective lines of direction cross at a wide angle--probably about 70. It is important to notice well these two bows, because with their aid it is quite easy to find a and 5 Librae. The larger bow is formed by Acrab (5 Scorpii) to the northward, 5 Scorpii in the middle, and 1r Scorpii to the southward. Arcturus, Spica, and Antares form a right-angled triangle, with the right angle at Spica. A line from Algeiba through Spica will lead right to Antares, at 46 from Spica. Ktfa Borealis is barely 9i from Kifia Australis (a Librae). A line from Regulus through Spica leads to Kifia Australis, at a distance from Spica of rather over 21?; but these two Kifias can be better found thus: --A line from Antares carried north-westward through Acrab leads to Ktfla Borealis at about 16' from Acrab. The gafl' of the ' Cutters rnainsail, ' extended a little south of Spica, cuts Kzfa Borealzls in another direction. A line from Antares carried 18 beyond the middle star of the large bow leads to Ktfa Australia. Ras Alhague, with Vega. and Altair, form an isosceles triangle, Altair being at the apex. The sides are Altair 34 Vega. Altair 335 Res Alhague. Vega 29k Ras Alhague. A line from Arcturus to Altair passes some 4 or 5 north of Ras Alhague...show more

Product details

  • Paperback | 308 pages
  • 189 x 246 x 17mm | 553g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236762584
  • 9781236762580