419 
Gtue^ 
bow, having a brass wire for its string ; with this they 
stand behind the box, and cut, by its opening, from front 
to back ; the pieces thus cut are taken out into the open 
air, and dried on a kind of coarse net work, fastened in 
moveable sheds of about four feet square, which are 
placed in rows in the glue-maker’s field, every one of 
which contains four or five, or more rows of net-work ; 
when perfectly dry and hard it is fit for sale. 
That is thought the best glue which swells consider^ 
ably without melting, by three or four days immersion 
in cold water, and recovers its former dimensions and 
properties by drying. Glue that has got frost, or that 
looks thick and black, may be melted over again and re- 
fined, with a sufficient quantity added of fresh, to over- 
come any injury it may have sustained ; but it is gene- 
rally put into the kettle, after what is in it has been purg- 
ed in the second boiling. To know good from bad glue, 
it is necessary for the purchaser to hold it between his 
eye and the light, and if it appears of a strong dark brown 
colour, and free from cloudy or black spots, the article is 
good.”— So far Mr. ClennelL 
A glue that is colourless, and of superior quality, is 
obtained of the skins of eels, and knoWn by the name of 
dze. It is also procured from vellum, parchment, and 
different species of white leather ; but for common pur- 
poses this is by far too expensive, and is only made use 
of in those cases of delicate workmanship where glue 
Would be too gross. The skins of the rabbit, hare, and 
cat are also made use of in the manufacturing of size, by 
those who are employed in gilding, polishing, and paint- 
ing in various colours. 
Another fine species of glue is known by the name of 
isinglass^ and is the produce of a certain fish very common 
in the Russian seas. From various foreign writers on the 
subject of glue, it appears tlrat it was first principally pre- 
