Miscellaneoits Implements ’Exhibited at 'Wanvich 547 
points of the blades. At the bottom of the fan space is an 
air inlet which can be adjusted to any extent ; if only opened 
to a small extent, the fan draws in but little air, and con- 
sequently the rate at which the pulverised material is blown over 
is but slow, and a fine sample is produced ; with an increased 
inlet of air it passes over more rapidly, and the sample is 
coarser. An examination of the fan blades after they have been 
at work some time is interesting, as they show distinctly that 
it is only the forward corner or point of the rectangular blade 
which is brought into operation and is subject to wear ; con- 
sequently the blades may be turned so as to present a fresh 
leading point until all four corners are worn. The machine is 
well constructed, and its design bears evidence of considerable 
experiment and thought. 
Article 3940. Messrs. Ruston, Proctor, & Co., Ltd., Lincoln, ex- 
hibited on their stand an 8 horse-power Portable Engine, in the 
construction of which they have introduced important improve- 
ments upon their former engines. The engine and boiler are, prac- 
tically si^eaking, distinct. The steel brackets for carrying the 
various pai’ts and bearings of the engines are all riveted to the 
shell of the boiler, which is then placed under a planing machine, 
and the surfaces of the brackets are planed all over to their re- 
quired levels. The various parts of the engines are then bolted 
to these brackets ; thus the whole or any part of the engine may 
be dismantled without touching the boiler. This system of 
construction especially commends itself for such engines as have 
a double crank with an intermediate bearing between them. In 
order to prevent any straining of the main crank bearing which 
is stayed to the cylinder, due to the unequal expansion of the 
boiler and the ordinary stay, a patent steam stay is used in 
which steam is made to circulate — thus keeping the expansion 
of the stay uniform with that of the boiler. 
Article 4191. Messrs. Ransome, Sims, & Jefferies, Ipswich. 
New Patent Double Row Potato Planter (Miles and Arter’s 
Patent). This machine (fig. 6) is constructed on the same prin- 
ciple as the single row planter described last year in the Journal 
as an exhibit at Doncaster, but with several improvements. It 
is now fitted with a pole for two horses and a seat for the driver 
within easy reach of the regulating lever. It is arranged to plant 
two rows at a time either on the flat or on the ridge, with or 
without manure ; a track wheel is provided, which forms a groove 
in the manure, placed between the ridges, and thus ensures that 
the potatoes drop in a line on the manure. 
The gearing is also much improved. The working is much 
the same as in the single row machine. The needles or forks 
