40 Canon Moseley on the steady Flow of a Liquid, 



By equation (58), 



2ylr b __2{h + cf , 



By equation (53), 



c c 

 Substituting in like manner b, ^, ^-— for U, ^|r, and ^ in 



equation (55)^ 



c 

 ^ = ^' = (^ + g)\ 



Observing that 



h^ fh\l.j_ . . ..i,L 



^ 2Vw^^(6 + c)*/ ]^ 7*(? ,V • -A^A 



.'. Q= . \ „ i 6b + c— -I 1 (sin 2)2/6 



^ r>^^x\bici V b + c J^ ^ ' 



^ 20-69l(b + c)h ^ ybc \ ^l 



Q= -, r^{6b+c^-^ 1 (smz)^r. . (61) 



7^f(M» ^ b + c J'^ ' _ ^ ' 



Flow of water through a closed rectangular pipe placed in continua-^ 

 tion of an open stream of greater section and fed by it. 



Two sets of experiments were made by MM. Darcy and Bazin "^ 

 on the flowing of water through closed pipes with rectangular sec- 

 tions, which they completely filled, the former in 1857 with a pipe 

 having an internal section of 0*8 metre by 0*5 metre, a length 

 of 70*3 metres, and an inclination of 0-0049 metre per metre, 

 and the latter with one having an internal section of 0*48 metre 

 by 0'3 metre, a length of 44*43 metres, and an inchnation . of 

 0*0049 metre. Each of the pipes was fixed in the bed of an 

 open stream 200 metres long, of uniform section and inclination. 

 The water could be supplied from the Canal de Bourgogne, and 



* Recherches Hydrauliques, Paris, Imprimerie Royale, 1865, p. 162. 



