LOW LIFT PUMPING MACHINERY. LXV. 
LOW LIFT PUMPING MACHINERY. 
By T. H. Houauron, A.M.1.¢.£,, M.I.M.E. 
[Read before the Engineering Section of the Royal Society of N. 8. Wales, 
July 21, 1897.] 
THE question as to which is the most suitable pump to adopt, is 
one that has to be carefully considered by any one proposing to 
raise water for irrigation, on a large scale, and the author has in 
the following paper ventured to bring before the Society, the 
results obtained with various types of pumps, and the cost of 
installing and working them. 
It may be taken for granted, that except in a few places, a 
maximum lift of 100’ is, as high, as it is profitable to raise water 
for irrigation purposes, and the author does not propose to discuss 
pumping machinery in general, but only such types as are suitable 
for lifts not exceeding 100’. The selection of a pump is governed 
not only by the engineering problems involved, but by the number 
of days a year it has to work, cost of fuel, and first cost, these 
latter constitute the financial problem, and frequently have more 
influence upon the selection than the engineering one. 
Seven different types of pumps will be considered, viz. :— 
a. Scoop wheels. 
6. Archimedean screws. 
ce. Chain pumps. 
d. Rotary pumps. 
e. Centrifugal pumps. 
J. Direct acting reciprocating pumps. 
g. Flywheel reciprocating pumps. 
Each of the first three types of pumps, is suitable for pumping 
water to only a very moderate height, the next two have been 
used for lifts of 100’, but not with economy, the height to which 
the last two types will raise water is only limited by the strength 
of the materials used in their construction. The most economical 
5—July 21, 1897. 
