, 1874-12-27

o,vo the average consumption pot Square Aoos ~
re-cTato surface per hour as G9$ ponnds- ihe
work done by tho steam supplied by these boilers
1T running six elevators, aud heating the Wnolo
building. These boilers are fitted wlth nay
Ior & Maginnis' smoke-consumlng appa1-
atus the principle OF which consists a essGnt1ny
in Introducing air into the furnace both through
the furnace-doors, which arc consequently al
iuated to introduce the air just over the surface
If rhe burning fuel on tho tira-grate, ana also
through perforated iron plate on the bsck enae
fiector walls of brick arc fixed Immediately IN
derueati the b boiler-shell !; the ono 10 TO oenect
any air drawn from the tire-door on to the sur
face of the Goals, the other is to defect the cur
rents Of flames which reach over Tue M plloGe Wa
through tho bridge wall. We shall prob@olY
llavo more to say Of this contrivance on future
OCCASION AT
FIELD LETTER co.'s RETAIL STORE
there aro four boilers made by Crane Broa., each
measuring II feet long by feet diameter. with
tire.erates OF feet inches by feet, anu hre-
door and aat-p1t openings OF areas oqnallng
little egs than one-:enth Of the area OF re-grata
average boiler pressure. IS pounds amount
and kind OF fuel used, 7,157 pounds (aVerage per-
day OF seventeen days rum Of Midway (bltumi-
nous) coal, per day Of fourteen hours average
consumption of fuel per square 1oot OF nte-sla1e
nor hour, Z pounds. These boilers provide
steam for running throo elevators and heating
tue whole OF the store. They also arc htted
NAAA~"N~ N.~----@o
rapgoment. at the
MCCORMICK BLOCK
there are two boilers made by Crane Bros, eacn
measuring II feet long by feet diameter. with
fire-grate4 measuring S feet by feet, anu tire
doors and ash-pit openings of areas each meaaur-
inr ope-fourteenth OF tho OF fire grato ayer-
age pressure msiutained in boilers 10 pounds per
e0uaro inch; consumption aud Kind OF fuel
used, 4,200 pounds por day OF fifteen hours OF
Hooking Valley coal; average consumption 1ael
1854 +a51
hounds. Work done by boilers: running one
elevator, and seveu-horHe-power engine "nicn
drives tile printing machinery OF the St6Hddra
and Interior. Tleeo boilers arc lifted With
for producing a stronger draught in the furnace,
aud thereby promoting combustion 1t consists
in four steam Jets inserted IN the front OF each
boiler, two over each hre-door, and 50
arranged as no9 to 9ay up pa5e q eDeah
OF tie grnto from the fire~door to the bridge; an
air-denecting plate is also introduced on the it-
side upper ols;e Of tue dre-openins to dehect oil
air entering from the fre-door on to the surface
Of the burning coal, orer which surface 1t passes
until coming directly in front OF the steam jets,
when it il propelled forward with much greater
velocity, it's place being filled with fresh air,
either from tho asll-pit below tho CRATE or from
tho fre-door, which was not provided with any
special arrangements for Introducing fresh AIR
into the furnace other than the ordinary
adjustable a1-shuster, 6 inches IN diameter, and
having three holes measuring about one-tWenty-
ninth tho area Of tire-door. The engineer, how
eyes does not uso this, as he states TINT when
in use they did not prevent the smoke, nor could
ho recognize any economy IN fuel; when re-
oucsteI, however, ho could not give any data to
the writer upon the relative economy OF fuel
when the boilers wero run with or without the
steam jc!s. Before tho steam Jets. Saylor L
Maeiuuis' arrangement vas in use, but was re-
moved, it il understood, in consequence Of some
disagreement between ths pa:entecs and Mr.
Cyrus Fl. Mccormick, owner OF the. building.
In the
REAPER BLOCK.
which is also owned by a1r. c: II. Mccormick,
thoro are two boilers, made by Crane Bros,
each measuring II feet long by 3 feet inches
diameter, with tite-gratas measuring feet
inches by feet inches; firc-doora and ast-
pits each equal to one-e1eyenth Of the area OF
the 6re-grate; average pressure maintained IN
boilers, 50 pounds; amoi'nt ana kind Of fuel
used $3.50 pounds per day OF fourteen hours ot
Hooking Valley coal; average consumption OF
fuel per square foot OF dre-srase per hour, l.lo
pouuda. These boilers were formerly fitted with
Saylor- l. Maginnis' 'smoke-consuming" ar
rangemeut, but it WAS removed on the
ean.e account as that in the Mccormick
Block Tile engineer did not state whether any
economy was effected when they we're IN use
Though not bearing on the main question OF our
subject, the following statements OF tho engl-
nuor at the Reaper Block may here DO recorded
Az the results Of experiment, he found that ny
Telling all his steam-pipes, both exhaust and
supply. to the elevator engine, he ELECTED . snF-
ing OF IL per cent on his fuel; also that where
formerly he used 2.S6 tons Of Indiana block ceal
lo now used 1.74 tons of Hooking Valley. this
being according to his opinion the relative econ
ou,y OF these two fuels. At the
SUPERIOR BLOCK
there are two boilers made by John Davis. each
measuring 1G feet long by feet 6 inches in d.
nmeter. with tire-grates feet inches BY feet
inches and tiso ami ash-plt doors. each cqua! TO
lis of tho area OF the fre-grate; aver
age pressure maintained IN boilers, 80 pounds per
gGuaro tuci, amount and kind OF fuefused. !, 600
pounds per day OF eleven hours OF Shawnee CO.,
coal average consumption OF fuel per square
foot OF grate-surface per hour, nearly pounds.
No arrangement for the prevention OF smoke is
affixed to these boilers; work performed, run
ming one elevator and heating two buildings BY
steam. In tho
sTAArs-zEITUSd BUILDING
there are two boilers made bT Il. Z. BushlcE, OF
the same size and character as those IN J. Y.
Farwell J. Co.'s dfy-goods store. The pressure
inch: amount and Aind of fuel used. 6,00(
pounds OF Erie screenings coal per day OF twen-
ty-four hours; average consumption per square
foot OF fire-grato per hour, y pounds nearly
boilers and used tho only difference between
the arrangement of that system here and III the
Mccormick Block is that in this case the air-do-
tlectiug plnte il omitted. In
THE ''TlMES IUILUINU
Two of Roots sectional boilers are in use. They
aro OF different sizes, tho one measuring II feet
by Il feet broad by II feet long, with tre-gra.e
measuring 10 feet inches by 4 feet 6 inches,
and three fre-doors each measuring one-tbisty-
second OF the area OF the tire-grate, and aeh-pit
doors one-nineteenth and the other measuring
II feet high by 10 feet broad by u feot long.
with f1e-grate measuring feet by feet s
inches. aud two tire-doors measuring each one
twenty ty-fourth Of the Of the fire. CRATE, and
ast-pit doors one-fourteenth. We understand
thut the larger boiler alone il used continuously
tits power being rated at $50 horse-power),
and tho other boiler kept, as 3 reserve;
The tubes forming the boilers are all
feet long. The amount and Kind OF fuel
used is $4,000 pounds per day of twenty
four hours Of Wilmington coal; average con-
sumption of fuel per square foot OF fire.
CRATE surface per hour IN large boiler, 159955
pounds; pressure maintained in the boiler, Gu
pounds per square iuch tire-dcors are fitted with
5-iuch revolving air shutters, same az those in
the boile,s OF tho Union Building, ETC. Work
performed By the steam is running one engine,
With cylinder II by 20 inches, one steam and one
gearcd-elcyator. and heating the whole building:
,rt frrT zrnnsa ia 1ffiYfH