preparation and mixing are always moving upwards to the
fusing furnace; and when manufactured, they are placed in the lears,
and drawn downward by machinery towards the ware-house, packing-rooms,
or cutting-shop; which arrangements prevent breakage, and unnecessary
moving of tons of materials. Besides the above, are a steam-engine,
shafts, laths, and tools in the cutting-shop, stoppering lathes, &c.,
so that the whole of the processes may be conducted on the same premises.
A furnace for burning the sand, another for getting up the pots to the
requisite white heat, preparatory to placing them in the fusing furnace,
also form part of the establishment.
The erections, with fixtures and implements,
for two ten-pot furnaces, capable of melting in each, per week,
about 12,000 or 15,000 lbs. weight, (from which can be manufactured
weekly into wares about 6,000 lbs.,) will cost from 12,000l.
to 15,000l., besides the expense of the ground. Thus, extensive
Flint Glass works in good situations may be estimated to cost about
20,000l.: they will be capable of making weekly about 12,000
lbs. weight of manufactured goods, half of which will have to be cut
or stoppered; and the total annual returns at whole-sale prices may be
estimated at about 25,000l.. With the exception of the pot-rooms
and cutting-shops, all the processes of a Glass manufactory are conducted
on the ground-floor, as it would incur great loss of labour to move
heavy masses of material into upper rooms.
The management of Glass-houses in France
and in England is uniform in the respective countries; but differs from
each other very materially.
The French, work and fill
continuously—that is, the whole of the workmen gather simultaneously
out of two or three pots: these, when emptied, are immediately refilled