Report on the Trials of Implements at Reading. 
663 
representative thought a man could do. In the field a speed 
of 48 to 50 turns per minute was kept up by one man. 
Phillips's iron machine, which is intended for either hand- 
or steam-power, was tried at 40, 76, and 80,— the low velocity 
representing hand-power and the higher speed what may be 
had by steam. In this case doubling the speed trebled the 
pressure. 
Lister's, being adapted for either hand- or steam-power, was 
tried at 40 and 80 revolutions of the handle. At the lower rate 
this fan did only the work of Phillips's hand fan, at an expen- 
diture of double the power. At double speed the displacement 
of water was trebled. 
Coultas's fan was tried with the water-gauge at 900 and 
1080 revolutions. At the first rate, the water-gauge indicated 
4'8 inches, and at 1080 revolutions the average pressure was 
5'7 inches. With this fan the pressure varied considerably 
from 5"3 inches to 5*9 inches, but the power required to work it 
was somewhat excessive for the little engine employed ; and the 
speed was rather irregular. This fan having three inlets, one 
directly in the rear, and two at the sides, the power required 
to work the fan with one, two, or three of the inlets open was 
tested. 
The only remaining fan which seems to call for any remark 
is Greening's (Agricultural and Horticultural Association) 
No. 1. This was only tried at 40 revolutions per minute, 
that being in the opinion of the Judges the greatest speed at 
which this machine could be worked by two men. It is use- 
less to attempt to conceal the fact that the Judges' estimate of 
the power required by this fan is not borne out by the dynamo- 
meter trials, although fully confirmed by the trials in the field, 
when the representative of the exhibitor was obliged to admit that 
a third man was required to relieve the two who were at work. 
The water-gauge showed 1'3 inch of water displaced, and the 
power required to work it open was •24-horse-power. 
First Tkials of Hay Dkyees. 
Having noticed at some length the various methods and 
appliances which were entered for competition, and having re- 
corded the trials to which the exhaust fans were subjected by 
the engineers, it becomes the duty of the Reporting Judge to 
recount the practical trials by which the Judges attempted 
to ascertain, not merely the relative merits, but also the 
economical value and efficiency of the different inventions 
and expedients which were exhibited. 
The action of the Judges has been the subject of some 
