Orleans County monitor. [volume] (Barton, Vt.) 1872-1953, 1876-05-27

1900 collectively, though this could be
increased to 25O0 horsepower should
occasion require. The cylinders are 40
inches in diameter, with 10 feet stroke.
The engines are provided with air-pumps
and cOndensing apparatus, and are in
tended to work from twenty-fv to eighty
pounds of steam, according to the re-
quirements of the Exhibition. The twin
engines are erected side by side upon
platform three and half feet above the
floor of the hall, and their connecting
rods work cranks set upon common
shaft, the axis of the great gear wheel,
80 feet in diameter, which reyolves be-
tween them This wheel weighs Sc
tons. and has a face of two feet, its 216
cogs MASKING with pinion on the main
line of underground shafting, which is
252 feet long, reaching north and south.
This first line of shaft connects by mitre
gearing six feet in diameter at It's ends,
and at two intermediate points, with
shafts los feet long running lengthwise
of the building. These four Longitude
nal shafts have on their ends pulleys
whose belts run up through the floor to
other pulleys on the eight lines of over
head shafting. each having length of
628 feet, and power applied to it of
about $50 horses. The main shaft also
continues southwark into the pump an
mex, and runs the pumping machinery.
The weight of the main gearing, shaft
ing, mitre gearing, and pulleys revolved
by the engine is 365,s pounds. The
whole weight of engine, underground
shafting, and boilers is 700 tons.
The gear fy-wheel, which, as we have
said, is 80 feet in diameter, makes SO
revolutions per minute, which is peri
phoral speed of 1884 feet per minute, or
about SO miles per hour. Here is where
comes in the action of the Corliss gov
ernor cutoff. The object is to make the
rotations perfectly regular irrespective Of
the amount of work the engine has tc
do. Suppose one quarter of work in the
various parts of the building should be
turned off at once, 1t is the duty of the
governor to feel the sudden relaxation
instantly, and cut off the steam in the
cylinder at an earlier portion of the
stroke. The governor cannot anticipate
but it is its duty to respond immediate
ly, its range being about, as stated
above, from 80 down to 20 pounds o
steam or even lower, and exerting
power as high as 25OO horses nominal
when the work is at its maximum, ant
so on down, according as the machine
are thrown out of action.
The pinion gear with which the gea
fly-wheel mashes is 10 feet in diameter
and weighs IL 900 pounds The crank
weigh three tons each the walking
beams are 27 feet long 8 feet wide, an,
| weigh ii tons each. The connecting rod
are of horseshoe scrap-iron, and are 3
| feet long; they are formed of 5000 horse
shoes. The piston-rods are of steel, l.
inches in diameter, and have speed G
/ 720 feet per minute. Each part of th
engine is accessible by stairs and bal
comics, the former being made to act a
braces to the structure.
The boiler-house is SO feet from tn
d hall, and has 20 upright boilers. of z
s horse power (nominaD each the mai
l steam-pipe is wrought iron, is 800 fee
e long, Is inches diameter, and it traverse
0 an alley beneath the floor.
S Horticultural Hall, is a beautifr
0 structure of Moorish architectural desigr
: 1t stands on a lovely terrace. shOl
: distance north of Memorial Hall, an
: commands a view of the Schuylkill Rive
: Valley and the northwestern portions {
: Philadelphia. On either side of it pi'
turesque ravines, spanned by ornament;
|. bridges, run down to the river. Th
!, materials of the building are iron an
glass, supported by fine marble and brio
# work. The main floor is occupied by
e spacious conservatory, with high glai
!. roof, and light gallery from which vi
n itors may look down upon the wealth (
! tropical beauty which glows below. !
:. the centre of the floor stands fountai
It of beautiful and appropriate design, fro
e which radiating walks divide the spat
o into beds filed with plants from Il
|. luxuriant South. Here are palms; hel
|. are orange and lemon trees laden wit
|. their golden fruit here may be see
n the banana, with its heavily laden brancl
r the guava. the India-rubber tree, an
}, hundreds OF other growths- some beaI
,e tiful for shape or color, some interestiI
q for their uses or rarity-unknown in OF
# hard Northern climate. One seems
:. breathe the very air Of the balmy sOut
n in this palace of enchAntment On Il
.s north and south sides Of the Main Ha
/ are four fOrcing-rooms for the propag
n tion of young plants. One Of these sid
It rooms contains a magnificent array
,e tree-ferns, gathered from various qua
ters Of the earth, and forming most i
IS teresting study. Tins room also co
) tains rare and valuable collection
,e plants from celebrated English gree