1 98 Report on Miscellaneoris Implemmis at Newcastle. 
to Messrs. David Hart & 
City Road, London. Both 
Co., of North London Iron Works, 
machines are alike in construction, 
the former having a platform 
72 in. by 34 in., and weighing 
lip to 21 cwt. ; the latter, a 
jilatfonn 45 in.' by 25 in., 
weighing ujd to 6| cwt. 
Fig. 1, on p. 197, shows 
the general appearance of 
both the prize machines, the 
special feature of which is the 
absence of all loose weights. 
The goods are weighed by 
means of two weights sliding on 
the steelj'ard, one representing 
cwts., the other lbs. When both 
are at zero, they balance the plat- 
form and other working parts of 
the machine. "When in use, the 
large weight is first slid along the 
steelyard, until it almost balances 
the goods. Afterwards the small 
weight is moved, until a perfect 
bnlance is obtained, the exact weight 
of the goods being indicated by the 
position of the sliding weights, in 
cwts., qrs., lbs., or any other de- 
sired standard, on a plainly engraved 
scale (see fig. 2). This arrangement 
prevents mistakes, and obviates the 
necessity of calculation. As the 
weights are never taken off the 
steelyard, they cannot be lost, or 
mixed with those of other machines. 
When the machine is out of use, 
or is being loaded or unloaded, wear 
and damage to the centres are pre- 
vented by a relieving apparatus 
which unhooks the steelyard, dis- 
connecting it from the working 
parts of the machine, at the same 
time lowering the ])latform on to 
solid supports, and the levers to the 
bottom of the box or frame. 
The frames are made with 
solid, close bottoms to exclude 
damp, and all the centres work in 
cups of oil. Tlie platforms are 
sus])ended on a universal joint, 
and swing freely in any direction, 
without grinding or damaging the 
centres, or disturbing the levers or 
any of the under parte. 
A special weight, not shown 
