Miscellaneous Implements Exhibited at WarwicTc. 537 
ment for a fixed engine. In it (fig. 5) the vessel containing the cir- 
culating water is placed above the engine, and it is only neces- 
sary to connect the cylinder to it with a flow and return pipe, 
when natural circulation will be maintained without the necessity 
for any pump. The engine itself is in all respects similar to the 
portable engine already described. 
Messrs. Crossley Brothers, IManchester (Stand 2G1), exhibited 
two petroleum engines, one of 4 horse-power nominal, the other 
of 9 horse-po\\ er. Their general arrangement follows very closely 
that of the gas engines by the same firm, the oil being converted 
into gas previous to its introduction into the cylinder. An oil tank 
of sufficient capacity for ten hours’ running at full power is pro- 
vided in the base of the engine. From this tank a small double- 
barrelled pump delivers the oil, one bari’el delivering to the engine 
cylinder, while the other delivers to a small tank supplying the 
lamp for heating the vapoi'iser and ignition tube. The suction 
stroke of the pumps is effected by an inertia governor actuating 
a small rocking shaft, the delivery stroke is effected by a crank 
action and gab motion at the end of the side shaft. In starting the 
engine, or at other times, it may be necessary to increase or 
diminish the supply of oil to the cyliuder ; in order to do this, the 
pumps are arranged with a tappet action, and by inserting a 
washer between the pump plunger and the crosshead working the 
same, the desired variation in the stroke of the pump is obtained. 
This particular adjustment applies only to the pump delivering 
into the vaporiser ; the other pump sup])lying the lamp having 
a constant delivery, and any excess of oil Mowing back to the oil 
tank. In the vaporiser, which is heated by a Lucigenlamp, the 
oil follows a circuitous path, is there converted into gas, and 
passes through an inlet valve, regulated by the governor, into 
the cylinder. When the inlet valve is opened, the vapour is 
drawn into the cylinder, meeting a supply of air introduced 
through an automatic air valve, and a further small supply of air 
follows the charge of gas drawn through a passage surrounding 
the case of the firing tube and, passing through the combustion 
chamber, completely scavenges the passages. A timing valve 
worked by cams in a sliding sleeve on the side shaft regulates 
the firing. 
Messrs. Priestman Brothers, Ltd., Holdemess Foundry, 
Hull (Stand 262). This firm exhibited two of their Horizontal 
Engines, one of 5 horse-power, the other of 18 horse-power, also 
one 5 horse-power Portable Engine, and one 5 horse-power 
Vertical Engine. The horizontal and portable engines have 
already been illustrated and described in former reports in the 
Society’s Journal — the horizontal engine in the Nottingham 
p p 2 
