On the Manufacture of Tin-plate. 369 
When the wash-man has passed jive of the 
plates through the melted tin, and from 
thence into the pot of tallow above men- 
tioned, a boy takes out one of them and puts 
it into the empty pot to cool, and the wash- 
man puts in the sixth plate. The boy then 
takes out a second plate, and lays it to cool 
likewise ; when the man puts in his seventh, 
and so they go on, in this regular manner, 
until the whole of the parcel is finished. 
In consequence of the plates being immer- 
sed in the melted tin in a vertical position, 
there is always, when they have become cold, 
a wire of tin on the lower edge of every 
plate which is necessary to be removed, and 
this is done in the followimg manner. 
A boy, called the list-boy, takes the plates 
when they are cool enough to handle, and 
puts the lower edge of each, one by one, 
into the list-pot, which is the vessel that was 
before described, as containing a very small 
quantity of melted tin, and the same as that 
which I have marked No. 5. When the wire 
of tin is melted by this last immersion, the 
boy takes out the plate, and gives it a smart 
blow with a thin stick, which disengages the 
wire of superfluous metal, and this falling off, 
leaves only a faint stripe in the place where it 
was attached. This mark may be discovered 
VOL, 11. Aaa 
