167

C.—3

Tabulated Statement of Experiments on the Carrying-capacity of Clean Pipes of Various Diameters under Different Heads carried out on the Waimea-Kumara-Water-races.

No. 2 Hole. Total length of pipes ... 12,500 feet. Total head ... ... ... 81 feet. Less ... ... 525 „ Less ... ... ... 45 „ Proposed length ... ... 11,975 „ Proposed head ... ... 36 „ r£ [ Pipe, 36 in. in diameter |tfd Radius, -750 log. 1-8750613 *> | Sine, -003012 log. 3-4788550 I-H a> 7 s 2)3-3539163 3)3-3539163 ' a tf 1 -j 2-6769581 1-1179721 ■>*£ 140 2-1461280 11 in. 1-0412927 o"-3 A 7-0685 -8493273 A 7-0685 -8493273 -* 3 |] || 47-034 log. 1-6724134 10-202 log. 1-0086921 > o 10-202 t> ' 36-832 cubic feet per second. § | f A -750 log. 1-8750613 g S -10560 = 31-80 log. 1-5024271 s s i 2)1-3774884 Ph IB £ " "> g m -6887442 || || A 7-0685 log. -8493273 >< > L 1-5380715 = 34-52 cubic feet per second. r Diameter, 3ft.log. -4771213 t M"i Total head, 36ft.10g. 1-5563025 *0 60 3 3: § | 2-0334238 S"Z v Total length, 11975 4-0782755 x -g ft . * "5 -I 2)3-9551483 kgl -2 "> J 2-9775741 g g 50 1-6989700 H |j A 7-0685 -8493273 f> < p> l . 1-5258714 = 33-564 cubic feet per second.

Diameter of Pipe. Kind of Pipe. j Total Length. Total Head. Hydraulic Gradient. Calculated from Actual Neville's Quantity of Formula. Water V = 140 VRS - d.scharged. Calculated from Eytelwein's Formula. V- 10560. 'RS 10560. Ft. 1,188 Ft. 4-46 Cubic Feet per Second. 24 Cubic Feet per Second. 25-9187 Cubic Feet per Second. 24-269 30 in. 21 „ 18 „ 30 „ 30 „ 30 „ 36 „ 36 „ 36 „ 36 „ 4-44 „ Wrought-iron riveted Ditto 16,335 2,514 943-8 943-8 943-8 11,136 11,621 11,213 11,975 1,254 28-92 32-73 1-18 1-65 1-51 4 24 11 36 12 1 in 266 1 „ 57 1 „ 77 1 „ 800 1 „ 572 1 „ 625 1 „ 2,784 1 „ 484 1 „ 1,019 1 „ 333 1 „ 105 22 12-5 14 16-75 16 12 28-75 19-75 24-4003 13-9885 14-2349 17-1546 16-3325 11-2204 29-9566 19-8111 36-832 21-767 12-689 14-099 16-673 15-953 11-922 28-593 19-703 34-520 0-321 // * • • tf ... tl • ' • il • • • Cast-iron ... a • • • „ t... 0-alvanised-iron 0-329 *The iubic feet .ttached sheet shows the manner in whii 3er second. ih the calculi ,tions are made. t Proposei pipe to carry 35