New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1859-04-12


ho,i1optL lave, has it, fulcrun 90 an ann prc;.,;.-
rom TIE stem; one enc Of the lever 10 cosnscssa h.,
INK with the bal arm the other end enters q .jot -,
In re movable rod irnds the stem. BY chsnsisr "a.
fucrun Of this lever nucs motion - Is wanted n,
be made the result Of gveo expansion Of the b,lh
In tie Of ocomotvss The Gu, of is used aoos al
req uls,ed BY hand. Several Of thsee cutoff, RAJ.
been sppled to machines al esdy built, ard in som.
sees unmspssesble, and the success has been coo.
pl.fe. One may be seen 8; TIE Ne~ Haven Deo.s
smother on the ergIe OF the Metsoiis Book Cons.r,
in Mulberry ,treet. In this establishment the pov.,
has been rendered 90 muca steady blythe chsays
bat they ue able to drive their presses much f.s.r
than ley we're accustomed to do, the pres ssedsr
meanwhile, making fever INTAKES.
BRIAD-MAkIyG james Perry, Of this city, ola u..
u at be Pas invented bev proo-ss which viii obvs.
great many difficulties in bread making The aoor
" sr,t nclossd in cir tight vessel and the a,uos.
pt eric air exhausted from but Oov Without tsii,x
the -four With il, we do lot see. sd the dough i ,b.e
mixed III der pressure Of ca bcn'c scii gas, mi,.I
Nth alcoholic spirits, and wren sufic epty keesdeI
forced ont Of an aperture into ,hsp-d loaves rss,
for the oven. The baking s.ips,es tue sprt ana ar
urrs ysa,t or sry other material Of fermentaio,-
yielding, the inventor says, teo per cent more food
than by the ordinary moce Of rendering bread light
PRoPo.rp REVOLUTION IN Car BuIpus.-TSs
weight of the passenger cars nov in common ne On
opr rsrosd, Iarges from eleven TO fourteen tuns od
this as light found to be advisable while wO<d
is employed as The material. A full sized sixty pssS,.
ger car is now being constructed at Psteron in Which
oiled iron is employed TO form the sides and ends sad
large pc rtion Of the top and bottom. With desr
to test very sfeisnty and economically such improve.
nebts promise to be Important several Of the prime.
al railroad lines leading from Boetop have agreed 10
divide the expense and sbor-an example which might
well be followed at many other points-and this carl
one Of the experiments, and evidently the most import.
ant II rs undertaken. TIE car expected to be fn,hd
and shipped to Boston in Q few weeks.
The entire body OF the car the only part which /,
peculiar, WILL it is estimated, Weigh 5000 pounds
The corresponding portions Of wooden carr Of similar
size weigh from II, 600 to 10 0C0 The construction
row complete with the exception Of the Ornamental
parts and windows, and presents very nearly the sp.
pesrance of the in common use, except that the
sides ore tbickly and systematically sprinkled With
rivets TIE metal 10 mainly used in bands each com.
posed Of several strips about oneeishth Of an inch
thick, and two inches vide Tnss are two systems u
these-one laid lepgthwss and the other trans.
versy, or around the body Of the At each inter-
section the bands in'erwesve alternate, and v.t
introduced at each of these points is found to give u
amount of strength altogether unprecedented, with 70
email quantity Of N sterals The ,ysxm Of construc-
ton 10 the invention Of French physician named La
Il - al 10 ~
bu rever yet been tested on so large scale. The
te.t. which have been applied to this structure in the
shop where it is building, chow it to be considerably
stronger than ordinary wooden cars and II 10 probable
that n behavior in case Of an socdent-such o. col
l.ion or running of the track, will be less dangerous
than that of timber it, fexbiy and toughnsss viii
then be put in requistion.
TIE general introduction Of similar care, II they b
found in every point successful viii result in diminc
ton Of the weight Of each car, from onesnds half %
two and a-h ah tuns alo wing the csrrisgs of CORE
spordiDgy increased quantity Of passengers or freight
without incrssaipg the expense for motive power or
track repairs.
SLIDING SAFITY VALVE FOR STEAM BoiLSS By
o. ID. SATTERLET OF PEsssrLvAsIA.-The ordinary
afety valve consists Of round desk resting seat
yer On opening the steam chamber of the boiler,
nd is kept down by means of opg lever ct the cad
of which weight is suspended or aspiring is attached
The nome the upward pressure Of steam under the
valve rises beyond the pressure Of the lever upon Il,
be valve is raised and puff Of steam escapes from
be boiler; but the valve lever and weight do not 70
main long thus suspended in the air. they fall back
IN their place by their own weight and the valve 10
scarcely raised when closes with an impact.
The momentum Of the parts has to be ovsrcome
q ain before smother puff is Jet out The result that
9 ssfety valve let's steam out very slowly, sa1
tbs ,s usefulness depends much more upon IL srsS
ing attention by the noise it produces, than BY ih
action in relieving the boiler. In feet, boilers are
swsys able to carry securely for short time, two OF
three times the ordinary pressure. Exposioss oc'r
mostly when, by the falling Of the water, some portion
of the heating surface has become heated to fros
OOOo to 1900 Farsnbeit Up to l,OOO0, hot irons
stronger than cold beyond this point it, snscity o.
cIeases rapidly. The moment water is let In ne
comes in contact with the hot surface, large body~
10 suddenly converted INTO steam, and the pressure
becomir more II ~ five tines what the iron can bs,
the DO Ter eIp,odss. Tho only remedy would b
valve Of large size, which would open % soon y
sts am begins to form in quantities, and would n
main wide open until the heated surface is cooled
srd has ceased TO be dangerous. This result
claimed for the valve Of Mr.. Sstterles which
we will now describe. II consists of cast iron boz
screwed over large opening in the boiler. The 10
terror Of this box is divided into three compatmeno
let. A Ste am Chamber. 3D. A Spring Valve Cham
Der. 30. A Cylinder. One side Of the steam'chsmoa
is cut with several steam opsurg and these are closes
by means Of ss many sliding valves yoked on tho 'sn
rod; this rod passes out through stufDg box, and
attached to lever This lever has its fucrum On ~
boiler and is linked 10 the rod of spston in the GYM
der slr.sdy mentioned. The spring valve lis ofthsof
dipsry kind, namely, dix resting on e seat on tho