50 
The great beams are of cast iron in two main sections over 32 feet long by 6ft. 
3m. deep, the two sections weighing 25 tons. The main gudgeon is of hammered 
wrought iron, and weighs nearly 4 tons. The bed-plate stools and pedestals for 
carrying main gudgeon are of massive proportions; all pin-holes are bored, and 
gudgeons made a driving fit. The parallel motion work is all finished bright with 
gun-metal bearings, the parallel motion being fitted with an adjustable anchorage 
block. I he out-end pins are of hammered iron, finished bright, which oscillate on 
gun-metal bearings fixed in each end of the two sections of the beam. The main links 
are of wrought iron, finished bright, with gun-metal bearings and turned distance 
pillars. 1 he in-door end of beam is provided with strong catch-bar and eyes. The 
cross-head is finished bored and turned to permit the piston rod to rise up through it 
w^ ^ dama 0 e, in case the engine should come suddenly in-doors from rods breaking 
or bucket tripping. The cylinder bottom is also furnished with a lead ring for piston 
to drop on in case of a similar accident, thus deadening the shock. The crosshead is 
made of steel and cast iron. 
The cylinder is 70 inches diameter, and of a sufficient length for a 9ft. 4in. 
stroke; its weight is 10 tons, bored, faced, and drilled, fitted with turned bolts to a 
cylinder bottom casting, all joints faced. "" 11 '* ‘ 1 “ 
Bottom casting weighs 5 
tons. 
1 lie cylinder cover and false cover are all finished bright, and furnished with 
foui gun-metal lubricators and glands, brass bushed; also a lantern brass for admission 
of steam to piston rod at neck of stuffing box. Cylinder cover weighs about 4 tons. 
^ ie stroke at out-door end of beam for pump is 8 feet, and will w ork a 22-inch 
lift foi oOO feet in depth. The air pump is 36 inches diameter, and is fitted with a 
mantie bucket, having vulcanized indiarubber disc valves on gun-metal seating. The 
condenser is fitted with intermittent injection gear and jet. 
I he feed pump is worked from the main beam, and takes its water from the 
hot well. 
ihe valve gear is carried on two weigh-posts, and is worked by tappets carried 
on tv o plug rods attached to the main beam. All the arbors, horns, and spanners, as 
WO I I no rvliiA, ^~ -- _ T 1 mi . 7 - ' d. , 
•j X 1 ' \/ Lii vi. i llilli JL 11 v v<l-liil U1 1 Lilli 
si t < X iaUSt ai i0rs are fitted with inside cpiadrants to keep the equilibrium valve 
bY hen the exhaust valve is open, the top quadrant abuts on the lower one, and 
keeps the equilibrium valve shut until it is released, when the tappet for the bottom 
shuts oft the exhaust, and allows the quadrant to pass, the equilibrium quadrant thus 
releasing it, and the valve is instantly opened by the weigh-arm. All the arbors are 
fitted with weight-arms for the purpose of lifting the steam. Equilibrium and exhaust 
wahes, all of winch are of the equilibrium type, are made of gun metal. 
.... ,. e r iaust y alv . e 1S contained in the bottom nozzle at the foot of the vertical 
fi fi! 1 I V m . n ! PT 0 ’ " llc fi 18 attached at the top end to the top nozzle piece. This pipe 
1 ? ,e , t0 P «**> contains tile steam' and equilibria'™ 
closion n °^ - V< i a - U ls )0Xec ^ * n un ^er a polished iron chest of handsome 
steef and tho Can ', ieS f ie 011 handsome polished columns of 
steel, and the several lever and rod attachments to spanners or arbors. 
cut off reo nhi'ifd'f ma > If ^ ^ lua ^ e fr° m 01) c to ten strokes per minute, and the 
two second 1 ™ hwof“ M At , ten stl ' okes P«* minute the in-door stroke takes 
seconds * Va 0 oue second occiirs, and the out-door stroke occupies three 
past veaHr^wTtm-i ? ichards \ H 2/dro-Pneumatic Apparatus for Shaft-sinking.— The 
iif foi wool lie ^ dCpart i U ^ "t-sinking, namely, the substitution of 
if Ins hopn c* i 0 , 1 ! 6 10< ! v .y dnfts have to be contended against. This experi- 
Lved tk ee lZ C r ri lly H the N ™ Nortl ' Homefush Companv, \vho 
JL, L as follows :^ 01 ' 0 aPpafatUS ’ a deScl ' i l )t!on of " Web, supplied by the 
liy forcil!Mm™ubc"in lenSTm 8i ? ki " S , 8,J “ fts U,, '»''8 h 1°°» or drift, or the like strata, 
id diameter aratb 'SSAffiF* S*“ f ^ 
flanges and ribs eYlendimr vurfinolNr r. ^ ° 11 made cast lron > the cylinders will have internal 
in cylinders to revive wionght-iron tongues^f dmvels^and^ th( ; r0CC8 f 3 '° b< ? CaSt 
on plan, so as to leave cylinders free from any projections inside or out. The lowemoTt cylfndertobe" made 
