590 
Re^Mrt on the Trials of 
Koss, was next brought to ti'ial in straw. This press is a modi- 
fication of the American press exhibited by McKenzie, so far as its 
method of pressing is concerned. But Mayos uses three plattens 
instead of one, and forces these down upon the loose materials, 
successively, by levers which operate in exactly the same way as 
those of the McKenzie Press. He thus obtains a greater density, 
but with a corresponding expenditure of time. In addition, Mayos' 
Press is made up of such a number of pieces that almost as much 
time was spent in taking it apart and glutting it together, ready to 
make a bale, as in making the bale itself. The receiver, in which 
loose material is placed for the purpose of baling, is similar to 
the " Bolting Tier " exhibited by Mr. Mayos at Newcastle, and 
described in the last number of the Journal (p. 201). Like that, 
it is furnished with a number of strings previously prepared, 
and so placed that the two ends of any given string can be 
brought together and buttoned around the truss after it has been 
compressed. 
As previously stated, Mr. Mayos' machine did not get be- 
yond a preliminary trial by reason of an informality in his entry. 
In that trial, it succeeded in compressing straw to a density 
of 8 lbs. per cubic foot, but took nearly half an hour to make 
a bale. There was no opportunity, for the reason just stated, 
of ascertaining the rate at which this press would make less 
dense bales, but it would have been very slow without doubt. 
On July 3 and 4< the machines of Bamber, McKenzie, 
Hoodless, and Warnes, which had been selected for a second 
trial, were again tried upon loose straw and hay. All these 
machines have already been described, and their performances 
in a second trial did not differ notably from the first, but 
McKenzie's continued want of density threw this machine out, 
and only three machines, viz., those of Bamber, Warnes, and 
Hoodless, took part in the final trials. 
These were conducted on July 4 upon old hay cut out of 
the stack. Warnes, who went in first, pressed the cut bales, 
at the rate of 5^ tons per day, with a density of 9| lbs. per 
cubic foot ; Bamber, who came next, baled, at the rate of 
8^ tons per day, with a density of 9"1 lbs. per cubic foot; and 
Hoodless, who came last, baled, at the rate of 4-2 tons per day, 
with a density of 9*7 lbs. per cubic foot — Warnes and Bamber 
making trusses of exactly the same size, and as nearly as pos- 
sible of 1 cwt. each, while Hoodless's bales were considerably 
larger, averaging 132 lbs. each. Finally, Hoodless was ruled 
out, leaving Bamber and Warnes masters of the situation. 
As between these two machines there was no question 
which should be placed first. Bamber had beaten Warnes in 
