. Tables of calculated hour-angles and altitude azimuth table 30N. to 30S. : ex-meridian tables 60N. to 60S. and calculated reductions ans azimuths of bright stars from 1 hour to 3 hours from Meridian / c by Blackburne . utenant Harry Pennell, , commanding the British Antarctic Terra Nova, Lyttelton, 3rd June 1912.] I have used your A, B, C and Ex-meridian Tables whenever the Terra Nova hasmade a voyage south, and have found them invaluable. In parts of Ross Sea the variationchanges 1° for every four miles run at right angles to the lines of equal variation, and thela
. Tables of calculated hour-angles and altitude azimuth table 30N. to 30S. : ex-meridian tables 60N. to 60S. and calculated reductions ans azimuths of bright stars from 1 hour to 3 hours from Meridian / c by Blackburne . utenant Harry Pennell, , commanding the British Antarctic Terra Nova, Lyttelton, 3rd June 1912.] I have used your A, B, C and Ex-meridian Tables whenever the Terra Nova hasmade a voyage south, and have found them invaluable. In parts of Ross Sea the variationchanges 1° for every four miles run at right angles to the lines of equal variation, and thelarge number of azimuths that it is necessarj^ to take during the twenty-four hours wouldmean a prohibitive amount of work if your all-embracing tables were not at hand. [From Captain Thomas Liddle, 31 Argyle Square, Sunderland, 30th December 1912.] Your last 1911 edition is undoubtedly the best book published for navigation, andthe cheapest. From W. A. Tilney, commanding 17th Lancers, Sialkot, India, 29th July 1913, to Captain Blackburne.] Your tables have practically enabled us to revolutionise night marching, as you seeby the enclosed report. 379 PRINTED BY NEILL AND COMPANY, LIMITED, EDINBURGH. VD 15647. VKS-G3380034 ^^o
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