534 Miscellaneous Implements Exhibited at Boncaster. 
than when the common hand-shears are used, it struggles less, 
and is not so likely to sustain internal injui'y. There are few 
flocks in England whei*e it would be found necessary to resort 
to such a wholesale system, as the shepherd can generally manage 
to shear his sheep without causing much hindrance to his work at 
shearing time, which is usually light as compared with that at 
other seasons, for the sheep are generally ranging wide instead 
of being close-folded. In those districts, however, where the 
shearing is done by gangs of men who go round from flock to 
flock, the machine might be found useful. It would be difficult 
to conceive a machine which could be better adapted for getting 
through a large amount of liigh- class work, and where flocks are 
numbered by thousands, as in the Colonies and in Argentina, it 
Fig. 12. — Hornsb}-'s Petroleum Engine. 
has already been found of great value, and will doubtless be 
more used. The price per shearer is 10?. for not less than 
twenty, including air receiver, and all apparatus except motive 
power and air compressor. 
Messrs. F. Honishij and Sons, Liriiited, CTranthara, exhibited 
a Petroleum Engine (Art. 3789), the chief feature of which is 
its extreme simplicity, a point of no little importance in the 
case of small engines placed in the hands of inexperienced 
operatives. 
The engine (fig. 1 2) is of the horizontal type with a trunk 
piston, the cylinder being 7| inches in diameter by 10 inches 
stroke, the mean speed at which it is worked being about 220 
revolutions per minute. In the Catalogue it is described as of 
