The daily union. [volume] (Washington [D.C.]) 1845-1857, 1851-05-21

the most powerful ever made II il to be shown work
THIS press placed At the top OF OF the towers or
piers OF the bridge. Being single press, there Is one
cylinder in which the punger works We may as well
remark here that il IS the water which 10 pumped INTO Tue
cylinder which forces the punger up Al the top OF the
plunger is fixed head, IRON each extremity OF
which the chains hang these chains were connected TO
the tube below the head works through Two guides
secured gder above, che chains being secured 70 e
tube below and the head above the plunger be-
ing forced up raised the tube soon As one hit was &C
complished. the tube was packed up underneath me
chains secured above the fasteogs which the
chains the head loosened and The plungef
with the head, then allowed TO descend 10 pre-
pare Tor another stroke; the chains were again made last
The head and the press was then ready ior an
other lift.
The press used for testing the castron girdes OF the
Crystal Palace roof is also exhibited In the case OF the
long Orders supporting the roof the nave, winch are
composed OF wrought iron, the principle was tes,ed anu
that deemed sufficient; but reliance could not pe
placed 10 the cast iron grders they were therefore, al
tested The pressure was not applied at Inc miadle o
the girler but at two pontseach at third oil lis
length, according 10 the nature OF the principle upon
which the girder is constructed
There are specimens of Wylds turn tables; some good
cranes There is also fine collection oil models LOT
amateurs TO scrutinze amongst which we saw raIsey
pneumatic locomotive again exhibited though not a.
work, which is perhaps as well
In the French department Derosne ct Gail ct Co. show
horizontal engine the parts OF which are well proper
toned it is connected to an alr-pumP used Tor the pur-
iracting sugar from beetroo is carried Near TO this
is superior piece Of mechanism in the shape OF pa
per mill, made by Middleton Elwell, an English firm
In Paris: at one extremity endless band of wire
gauze OF the required width which passes round rollers
this the pulp allowed to flow; the thickness Of the
paper is regulated according to the flow OF the pulp
according 10 the speed which the wiregauze is driven
the pap carried along by the gauze the water per-
colaes through sometimes jogging motion is given to
the ganze eectually to set the pulp which having
acquired certain degree OF consistency, just sufficient to
bear being removed It passes to long jack towel il
we may so term it, which absorbs the moisture more
efectually the pulp thus travels on, gradually acquiring
greater degree Of consistency, till i passes over three
cylinders heated by steam. each cylinder increasing in
temperature the paper is then made and is cut ongtu
dnaly and ransversely into any sized sheets All this
| is done by the same machine.
In the Austrian department. there is stationary direct
action engine by H. d. Schmid remarkable in appear
ance for the immense strength Of the framework II has
governor. which may be possessed OF some peculiar
deicacy Of action, but it appears to rather liable 10
arrangement Altogether. the engine ID well fitted up and
finished