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Published online by Cambridge University Press: 28 July 2016
page 100 note * For a survey of these problems, see Luftwissen, December, 1935.
page 104 note * This new system has now been completed. As a result of minor modifications in design the following performance has been attained: Standard-wave error, 1° to 4°; pick-up factor, 4 to 10 metres; instrumental error, (maximum).