FLORIDA STATE HORTICULTURAL SOCIETY 
69 
per acre, and is very easily taken up and 
moved to another point. It must be re¬ 
membered though, that such pumps are 
only available where low lifts are possible, 
and where large quantities of water are 
available. There are a large number of 
pumps on the market similar in general 
principles to the home made pumps de¬ 
scribed. These pumps are used in many 
parts of the south for drainage purposes 
and in the north in flooding cranberry 
bogs. The low pressure centrifugal and 
the Wood impeller pumps are also very 
good for large quantities of water. Such 
pumps are likely to be much more efficient 
than the home-made variety, and would be 
advisable if a permanent plant is to be in¬ 
stalled. If a head of over four feet is to 
be pumped against in the home made 
pump it probably would be advisable to 
put in two propellers instead of one. The 
shape and number of blades of the pro¬ 
pellers can doubtlessly be improved upon, 
and we hope to be able to experiment with 
them before long. 
Overhead sprinkler systems of various 
designs have assumed considerable prom¬ 
inence on the east coast during the past 
few years, many of the systems being 
designed by local men. These systems 
are excellent for close planted crops, and 
also have the advantage of affording some 
protection against light frosts. Of course 
such systems are expensive, especially 
since the war, on account of the high 
price of iron pipe. Many such plants will 
continue to be installed, yet I still insist 
that if irrigation can be accomplished at 
less cost it should be done, and in many 
cases cheap surface methods can be used 
instead of overhead methods, both for 
grove or truck patch, and in any case a 
thorough investigation should be made be¬ 
fore a large outlay is made. 
Mr. Robinson: I want to emphasize 
the importance of the citrus irrigation 
outlined by Mr. Stanley. We have re¬ 
cently put in about ten acres, irrigating 
with this vitrified tile, six inch size, and 
are astonished at the amount of water we 
get through this method of delivery. We 
can irrigate three times the amount of 
land we were irrigating with that one 
well. If we had had this information sev¬ 
eral year ago, it would have saved thou¬ 
sands of dollars for us. 
Vitrified tile is very well described in 
the bulletin he refers to, and I hope you 
will investigate it thoroughly before you 
do any more irrigating. 
