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«evor-il' e v, en S ,nes similar to the above, each possessing the power of pressing witiihundred tons, are arranged in one line, in subdivisions of four; the spaces

96

between each subdivision serving as P assa |®®, t( |Leupils twenty-five feet, so that thefrom the front to the back of the presses. «

total length of the apartment is 100 feet. . , d / ov plates, as they aie c > ,

To each press is attached a pair of put . ^ se q Ue l. One of these pa

manner of forming which will be described m that it rests upon a kind of

to the upper block of the press. t ° t0 apply more exactly to the ™ d er fe 1

universal joint, which enables this pia „ ^ press, commonly called the sill-

plate. The latter sits on the “ ov t f c Ce on each other very nicely, by means ot

ih. rr s J in „ ^ It „.

■Sr® rjawps; ;«-** ««?»

°f a- peculiar construction, having solid rams accurate y connected,

these cylinders, three little force-pumps, worked by a steam-en 0 inii, j ded with a

The piston of the large cylinder is eight inches m d^ter a “ 5 feet through atop-weight of five tons. This piston can he made to rise inch ; n diameter,

leather stuffing or collar. The other cylinder has a piston of only o the ot her, of

which is also loaded with a top-weight of five. tons. It is capab ,being raised two feet through its collar. . f s j x small force-pumps

Supposing the pi ston s to he at their lowest point, four ot the s ^ and tw< >

are put m action by the steam-engine, two of them to = the cylinders, that

the little one. I n a short time) so m uch water is injected int ^ ^ ready for

the loaded pistons have arrived at their highest points. V-up, conveyed fr 0 ™

working the hydrostatic discharge-presses, the water press ® tubes, of small

the one apartment to the other, under ground, through stiong a

calibre. . • nication between the large

Two valves are attached to each press, one opening a commun