462 The Trials of Spraying Machines at Cambridge. 
the barrel, and a third is screwed on the end of the tap inside 
the barrel, through which the liquid is pumped into the distribu- 
ting pipe when the machine is at work. 
For travelling and passing through gates the projecting arms 
can be readily closed up behind the machines by removing a 
bolt. 
One horse can work the machine, which will cover, it is said, 
from 8 to 15 acres per day. Its cost, which seems rather high, 
is 25 1. 
After the first turn or two, when slight stoppages occurred, 
owing to the pipes, taps and nozzles being new, there was hardly 
a hitch in the progress of the machine at work. The leaves were 
covered with the Bordeaux mixture in a fine mist. When the 
leaves were dry the bright blue deposit could be easily seen. It 
is calculated that about 8 acres could be got over per day, 
according to the work accomplished during this trial. But it 
must be remembered that everything was new, that the horse 
was not accustomed to the work, and the supply of liquid was 
not regular. 
There could be no doubt whatever that this machine was 
entitled to the prize, as being by far the best of tbe three that 
competed. It is considered that it is admirably adapted for the 
application of Bordeaux mixture, and will prove of indescribable 
benefit to large potato growers in seasons of blight if a few 
necessary alterations and improvements are made, and the price 
is reduced. 
The machine (No. 4643), priced at 37 1. 10s., exhibited by W. 
Weeks & Son, Limited, did not distribute the Bordeaux mixture 
at all regularly. In some cases the leaves were thickly covered, 
in others there was no mixture on them. This could be seen 
clearly when the leaves were dry. This machine holds only 50 
gallons and sprays 6 rows. There was no effective strainer in 
the machine tried at Cambridge, consequently the jets were 
frequently choked. The spraying was confined entirely to the 
upper surfaces of the leaves. 
The other machine, No. 4686, exhibited by P. Mayfarth & 
Co., 16 Mincing Lane, E.C., is styled “ Syphonia, the Patent 
Self-acting Spray Distributor,” and is priced at 227. 10s. It is 
self-acting, the liquid contained in the long narrow tank being 
forced through the pipes and nozzles by a continuous pressure 
of air, no pump being required. 
The tank, as shown in fig. 2, rests by means of two pivots 
in an upright position upon the frame, and holds 22 gallons of 
liquid, which will last about 25 minutes. Air is pumped in 
first up to a pressure of “ 1 atmosphere,” indicated by the 
