RECORD: Darwin, C. R. & George Darwin. n.d. The stream flows in a cylindrical bed. CUL-DAR52.C1-C4. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 10.2022. RN1

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin.


[C1]

The stream flows in a cylindrical bed & the width is 5 times the depth. The vel: is deduced from Eytelwein's law i.e vel = 10/11 √ (fall in inches in 2 miles) x (hydraulic depth of stream)

[table not transcribed]

[C1v]

[calculations not transcribed, page crossed]

[C2]

Let the stream flow in a cylindrical channel & let BAC = 90°

[Diagram and calculations not transcribed]

[C3]

Let the width of stream be 10 feet

[calculations and table not transcribed]

[C3v]

Theory

Beds of Gravels flowing over frozen snow.

[C4]

The depth of the stream is supposed to be 1/5th of its width and the stream to flow in a cylind the bottom of a cylindrical bed

Then by Eytelwein's law

[table not transcribed]


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Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)

File last updated 26 October, 2022