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]
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 26 October, 2022