28 
BULLETIN 57, U. S. DEPAPIMEXT OF AGBICXn.TTJKE. 
this method. If this method is preferred, it should be so stated in 
purchasing. The following table gives approximate sizes of hv- 
draolic rums to suit certain conditions. 
; kes of hydraulic rams. 
mber. 
: — e r5l: - 
3k :. 
Sue ::' 
z-i: —:-•_:-: 
require 5 
State 
engine. 
Least fail] 
:..--..- .. 
Widtli. 
: ; : ; ~ - 
: r 
; 
Ft. ins. 
- 
- 
: s 
; • 
- 
: 
FL . . 
2 10 
3 
3 3 
Ft. ins. 
: 12 
12 
i -> 
1 3 
1 3 
] c 
If 
: : 
-. 
3 
7 
2 
12-28 
:■:■—: 
30-7-5 
Fleet 
2 
■ 
: 
2 
2 
2 
1 30 

Fherearef arse arate problems connected with the hydraulic ram. 
Th se, with - ra fci al examples, are described by TV. C. Davids a 
- : Hows : 1 Given the fall. lift, and quantity of water desired, 
find the ss ry s ly f s] ring. 2] Given the hft. quantity I 
ive water, and quantity of water desired, find the fall required. 
riven the fall. lift, and quantity of drive water, find the quantity 
iter su pB the storage tank. i Given the fall, quantity 
"live water, and quantity of water desired, find how high this 
r can be pumped. 
The ds which i Dow are based upon an approximate rule, 
d as follows : Multiply the fall in feet by the quantity of 
r su lied 1 g lions per minute, divide the product 
by the height the water is to be raised, and the result will be in 
g D ds per minute. > ay be expressed in an equation as follows: 
QxH . , . , n \ . n 
<l = -^-j — • in which y=supply of spring rn gallons per minute. 
22= fall in feet from spring to ram. h= height of storage 
re the ram in feet. g= quantity of water pumped in gallons 
ite. The result should be reduced by about one-third to allow 
for fri "i . 
Example 1. It is desired to find the quantity of drive water in 
s ring necessary ise S gallons per minute to a height of 
eet, when the head of drive water on the ram is S feet. Sub- 
— ; — =60 gallons per minute. 
state g in the equation Q = -=^ 
In this case ah i -third : the result should be added to allow 
in pines, valve-, etc.. making the necessary drive v 
ly 80 gal 
iJBssck^ i . : Mo. Bui., 10 (1912)', No. 2. 
