64 
FLORIDA STATE HORTICULTURAL SOCIETY. 
of water on the land. He says I could 
open four or five lines but would lose my 
pressure and could not get more water. 
I will be entirely satisfied, however, If I 
can deliver an inch per hour, as in 
thirteen hours I could cover each of the 
thirteen lines, and by beginning about five 
or six in the evening I could finish by 
seven in the morning, and I would have 
thoroughly wet down five acres of land, 
and the next night I would repeat the op¬ 
eration. 
Mr. Temple—What is the size of the 
the uprights ? 
Mr. Gillett—One engineer said an inch 
pipe was absolutely necessary, while 
another told me that 1-2 inch pipe would 
do the work. I made an experiment myself 
using a 3-4 inch hose on my line. I then 
tried the same spray with a 1-2 inch hose 
and could see no difference in the amount 
furnished, although I had no way of cor¬ 
rectly measuring it. We all understand of 
course, that with a long stretch of 1-2 
inch pipe the friction would be tremendous 
and a great deal of force or pressure would 
be exhausted in that way. Several com¬ 
petent authorities who have figured on the 
matter say that a 3-4 inch pipe will be 
ample. Before putting in the system I 
wish to make a series of experiments and 
these should demonstrate conclusively the 
size of pipe needed. My personal opinion 
is that it is just as well to water the 26 
trees on one line thoroughly in an hour as 
it would be to put a fine mist over 100 
trees and run it four or five hours. 
Prof. Williams—What kind of pipe are 
you going to use ? 
Mr. Gillett—This matter of pipe is 
something on Which I would like to have 
some information. The dealers as a rule, 
tell you to buy galvanize.! pipe, telling 
you that it is cheaper in the end. At the 
present time pipe is cheaper than it has 
been for many years, as it is at least 22 
per cent, below the ordinary price. 
In a former irrigation plant I had some 
pipe that was under the ground eleven 
years. It was steel pipe, and before lay¬ 
ing it I painted it carefully with hot coal 
tar and when it was taken up at the end of 
eleven years it was apparently just as 
sound as when it was put down. If any¬ 
one else has had experience along* these 
lines I would like to hear from you. 
Mr. Dade—I think you will find that 
the cast iron will not rust in the ground. 
Mr. Temple—For your information on 
this pipe question I will say that I was in¬ 
terested in a series of experiments costing 
a great deal of money, and these ex¬ 
periments showed that for underground 
work where steel will last as one, wrought 
iron will last as three, and cast iron will 
last as five. Wrought iron is practically an 
impossibility today; you may buy it and 
pay for it, but you will get steel just the 
same. 
As to galvanized pipe lasting longer 
than the plain pipe, I have some galvaniz¬ 
ed on my place that has been down for 
ten years and is perfectly sound, while I 
have some, made extra heavy, that in five 
years was entirely gone. I have seen some 
black pipe painted with hot coal tar and 
care taken in its preparation and laying 
that will out last any galvanized pipe that 
can be put in. I have seen the black cast 
iron pipe painted and laid that for certain¬ 
ly nearly thirty years was in nearly as 
good condition as when put down. The 
wrought iron blackened pipe will last a 
long time, but not nearly so long as the 
