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On the Soaring of Birds: being a Communication from Mr R. E. Froude in continuation of the Extract from a Letter by the late Mr William Feoude to Sir William Thomson, published in these “Proceedings,” March 19, 1888

Published online by Cambridge University Press:  15 September 2014

R. E. Froude ,
William Froude  and
William Thomson
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Extract

The object of the present communication is to give the purport of the remainder of the letter referred to in the title, as well as that of other letters bearing on the same subject written by the late Mr Froude shortly afterwards, which were not at hand at the time the extract referred to was printed.

Type
Proceedings
Information
Proceedings of the Royal Society of Edinburgh , Volume 18 , 1892 , pp. 65 - 72
Copyright
Copyright © Royal Society of Edinburgh 1891

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References

page 68 note * These figures give . Memoranda of Mr Froude's include weights and measurements afterwards obtained, which show much higher values. Recent measurements of my own of an albatross preserved in spirits at the Museum of Zoology, Cambridge, give .

page 69 note * As a justification for this, Mr Froude suggests the circumstance that in the cup anemometer the circumferential speed of the cups is accounted to be ⅓ the speed of the wind ; hence the relative speed of the wind facing the concave surfaces is only one-half that facing the convex surfaces, yet the wind presumably exerts the same force on both.