204 
Application of Steam Power 
rails will become invaluable for enablins: the farmer's engine to 
draw his harvest home, lead out manure, and market his produce, 
and especially for bearing the ponderous burden of a massive 
enjrine over arable land, with little detriment to the tillage con- 
dition of the moist or dayey soil. The price of Mr. BurrelFs 
engine, as exhibited at Chester, is 750/. to .800/. : Messrs. 
Tuxfords' prices vary from 550/., the cost of an engine capable 
of working up to 20 horse-power, driven from one wheel only, 
up to 1020/., tlie cost of an engine working up to 32 horse- 
power, and driven from both wheels, with disconnecting ap- 
paratus. 
Mr. Burrell patented, in April, 1(S57, the application of th<^ 
Boydell rails to common portal)le engines, driving one or both of 
the wheels by very simple mechanism. A single-cylinder 
traction-engine is thus made ; and is steered and also assisted 
over abrupt ascents or obstacles by one horse in a pair of shafts. 
This combined arrangement removes in a great measure tho 
liability to accidents incurred by horses passing a puffing engine 
and black smoking funnel on the high road. The engine is 
capable of drawing a threshing-machine, a set of ploughing or 
cultivating tackle, &c., over rough roads, or, indeed, where no 
roads exist. The first Avas exhibited- at the Salisbury Meeting 
in 1857, and Mr. Burrell has sold two, which are now in work 
with itinerant threshing-machines, the horse-steerage answering 
its purpose very well indeed. He informs me that one of these 
engines has been in daily use for twelve months, without repairs 
of any consequence. The additional price of an engine so fitted, 
with plain wheels in front and a water-tank beneath the boiler, 
is about 140/. 
Mr. J. A. Williams, of Baydon, Wilts, patented, in January, 
1857, a remarkably simple way of making jiortable engines 
locomotive for purposes of steam-culture, consisting in attaching 
a chain-wheel to one of the hind carriage-wheels, a chain-pinion 
on one end of the crank-shaft, and passing an endless pitch-chain 
round them. Driving by a pitch-chain may not be the best 
mechanics ; but, if wearing more than toothed wheels would 
do it, a\'oids having an intermediatt; motion or s\ibstituting 
larger carriage-wheels. At tlie Salisbury Meeting, two engines 
thus fitted displayed their travelling capabilities, with horses to 
steer, and they took themselves and their respective machines 
(consisting of windlasses and tenders combined, j)l()ughing- frame, 
&c.) home, a distance of 40 miles, witli the assistance of one 
horse to steer ; carrying, in addition to the weight of the ma- 
chinery, 100 gallons of water and half a ton of ( oal. Assistance 
from horses was required only at two hills, which were very long 
and steep. 
