538 Miscellaneous Implements Exhibited at Warwich. 
and Plymouth reports. At the former Show it received one of 
the Society’s Silver Medals ; at the latter, the special prize 
offered in a competitive trial of oil engines. The portable 
engine received a Silver Medal at the Windsor Meeting of the 
Society, and is described and illustrated in the report of 
that show. The vertical engine has been designed specially 
for use on board towing barges and launches. An interesting 
diagram was exhibited by Messrs. Priestman, consisting of a 
map of England, with the locality of the number of engines 
placed in England marked on it. It shows very clearly the 
rapid growth of this business. 
Messrs. Weyman & Go., Ltd., Guildford (Stand 263). The 
engine exhibited by this firm and described as a new implement, 
is the outcome of Knight’s Engine, which appeared in the 
Plymouth trials. Since that time it has been modified very 
considerably, and in its present form very favourable reports 
have been made of its working. The engine in question was 
stated to be of 4 horse-power nominal, giving 6 horse-poAver 
actual on the break, and is known under the name of the “Trusty” 
Engine. The arrangement of the engine is similar to that of a 
gas engine. Two cams on the side shaft actuate the air and 
exhaust valves, which are placed on the underside of the cylinder. 
The oil pump is worked by a trip controlled by the governor. 
The oil passes from the reservoir into which it is pumped to 
the vaporising chamber, at the end of which is attached an igni- 
tion tube similar to that used in a gas engine. The ignition 
tube is heated by the flame from an oil lamp blown by an air 
pump, operated from a disc and crankpin on the end of the side 
shaft by means of a bell crank lever. The engine works on 
the Otto Cycle, and is very simple in its general arrangement. 
A Weyman Engine was also exhibited (Stand 94) by Messrs. 
Clayton & Shuttle worth, who manufacture these engines under 
a licence. 
Messrs. Penny & Go., Lincoln (Stand 265). A 2^ horse- 
power engine on Weatherhogg’s Patent was exhibited by this 
firm. Owing, unfortunately, to a breakage Avhich occurred to 
the pump, it was not seen in operation. This was the more to 
be regretted as its mere appearance was not very taking. The 
engine differs from other oil engines in that the ratio of the 
gearing of the side shaft is 3 to 1 : thus an explosion, Avhen on 
full work, only takes place every third stroke, one idle revolu- 
tion being a cleansing stroke. The oil is pumped into the 
vaporiser, which is heated by an oil lamp, at a pressure of about 
70 lb., and then passes through a reducing valve into a cham- 
ber, where it is mixed with atmospheric air on its way to the 
