Report on Implements at Preston. 
729 
while others are seeking to preserve green fodder in silage stacks 
closely compressed, but otherwise protected by nothing but a 
roof to shoot off the rain. 
A model of the Ensilage Stack Press, manufactured by Mr. C. 
G. Johnson, was exhibited at the stand of the Aylesbury Dairy 
Company, and is partially represented in Fig. 27. The end of a 
flexible galvanized-iron wire rope is looped on to a crutch at one 
end of the cross-heads, which move loosely up and down on the 
screwed bars made fast to logs of wood, which are held down by 
Fig. 21.— Mr. C. G. Johnsoiis Ensilage Stack Press, No. 3957. 
the weight of the stack built upon them. The rope is passed over 
the top of the stack, and hitched on to a corresponding crutch 
at the other side, and, returning at short intervals, is laced over 
the whole series of crutches on all the cross-heads, and then 
made fast by hitching it round the last crutch. The cross-heads 
are then tightened down, one at a time, by screwing the nut on 
the upper side of each of them. The screws are 4 feet long, to 
allow amply for the settling of the stack between one day's 
stacking and the next. The reel shown at the side of the 
stack is not used in tightening ; it is merely used to wind the 
rope on when out of use. The screws are so adjusted that the 
spanners, pulled with a force of 40 lbs., exert a pressure of 1 ^ cwt. 
per square foot on the stack. When the silage is used, the wire 
ropes are thrown off from one cross-head at a time, and the 
pressure continues undisturbed on the remainder. The stack 
can be built peak-shaped, and thatched over the wire rope. 
The appliances needed for a 30-ton stack, 11 feet square by 
11 feet high to the eaves when settled, include 3 pairs of screws 
with cross-heads, wire rope, reel, 6 spanners, and 2 hand-wheels 
for running back the nuts ; the whole costing 9/. A 200-ton 
VOL. XXI. — S. S. 3 B 
