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Published online by Cambridge University Press: 28 July 2016
One of the latest branches of scientific research in which aircraft have been employed is that of polar survey and exploration. It is well known how much time can be saved, and how much labour avoided by using aircraft for surveying large areas of difficult country. There is probably no part of the world more difficult of access than the regions surrounding the two Poles, and there is certainly no part of the earth where exploration and survey is harder to carry out.
page no 891 note on * See Appendix D for temperature gradient in Spitzbergen
page no 893 note on * See also Appendix D.
page no 896 note on * See Appendix C.
page no 896 note on * See note “ Drift Indicator.”
page no 898 note on * Margin of 250 lbs. left here for conversion of undercarriage, etc. C. F. Fokker, F.VII. 3M.
page no 898 note on † These figures are based on those given for two men by G. Binney, With Seaplane and Sledge in the Arctic.
page no 899 note on * At cruising speed this gives a margin of 23 per cent.
page no 899 note on † This includes a W/T set, sun compass and sextant, besides instruments normally fitted to machine and included in the empty weight.
page no 899 note on † This gives some allowance in case of forced landing until relief could be sent.
page no 899 note on * See paper read before the Institution of Aeronautical Engineers by F. S. Barton, M.A., Air Photography Apparatus, November 30th, 1926.