_______
_________________
___________________________
____________________
290 Molesworth’s pocket-book
Drainage of La^p,
Soil.
Depth of
Pipes.
Distance of
Pipes apart.
Stiff clay . ..............
Friable ditto_________
Soft ditto ., .. ,
Loam with clay .. .
Loam with gravel .,
Light loam.........
Sandy ditto .. . . .
Light sand with gravel ..........
Coarse gravelly sand ..
ft.
2
3
3
3
3
in.
I
2
3
9
0
6
feet.
15
18
21
21
£
40
50
60
T4BI4S 0F 'roe Powra bbqujbkp to Raise .Wateb fbom Deep
Wells. (J. T. Hurst)
Dia-
meter
of
Pump
Barrel.
Descrip-
tion of
Pump.
Quantity
of Water
Raised
per hour.
Maximum Depth from which this Quantity
can be Raised by each Unit of Power.
One Man
One
mu« in an .
turning Do,!key
a Crank.
a Gin.
One Horse
working
a Gin.
One Horse-
power
Steam-
Engine.
inches.
2
3;
Doable-
action
lift and
force
pump.
gallons.
225
360
520
700
900
feet.
80
Ö0
35
25
20
feet.
160
100
70
60
40
feet.
660
350
245
175
140
feet.
880
650
385
275
220
COMPABATIVE PERl’OBMANCE OP METHODS USED IN INDIA FOB
Raisino Water. (Roorkee Treatise.)
. Height raised = 40 feet. Bay — 8 hours.
Discharge
per hour.
Discharge
per diem.
Power
Employed.
Method.
$
£
I
J
1
3
3
Paecottah .. .,
Baling * .. ..
Single mot ..
Double möt ..
Single Persian)
Wheel .. /
Double ditto ..
2-5
I
&
® tp
fl
90
75
70
66
55
60
29-07
37-5
149-5
165-8
69-3
198
181*4
236-2
924
1045
429
1242
232-
300
1196
1326
654
1704
1451
1876
7392
8360
3432
9936
1'29
2
4’2
* Calculated on |th of the quantity raised 5 feet.
tii.K ITIO* 'Flirt T-^a4<-»t. 1 mL. _ . i > • . . ■ ~
6'8
2
2
2
12
2-8
t (> n On ?I u . 1nantity raised S feet. The ratio of discharea
IVhii i 'S Eae‘'ot,^h M !• The relative cost is taking tho Double Persian
Wheel M 1. Cost and wear and tear of machinery h not iucluded