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Smith, G. / The laboratory; or, School of arts: containing a large collection of valuable secrets, experiments, and manual operations in arts and manufactures, highly useful to gilders, jewellers, enamellers, goldsmiths, dyers, cutlers, pewterers, joiners, japanners, book-binders, plasterers, artists, and to the workers in metals in general; and in plaster of paris, wood, ivory, bone, horn, and other materials
(1799)

[Part VI.] Varieties of glues and cements, for joining wood, stone, glass and metals,   pp. 272-277


Page 276


2174              TI        oA.OATOX.Y.
scraped lint; mix it up with the white of an egg, smear it
on a linen cloth like a plaister, and with it enclose the
craksl of yowi gja~s retort, or other glas utens'l; but let
it dry before you put it to the fire. Or,
  Take old varnish, and glue your pieces together; tie
them close, and set them to dry in the sun, or a warm
place; when dry, scrape off the varnish that is pressed out
A the sides, and it will hold very well.
                 To join broken Amber.
   ANoiNT the pieces with linseed oil, join and hold them
co    togther over the fire.
An excellent Glue or Cemnent to ?nix with Slone, Glass,
   Marble, Kc. in order to make Utensils, Iniages, and
   other things therewith,
   TAKE of fine glue four ounces;. of mastich two ounces;
 of powdered sealiig-wax six ounces; of finely ground
 brick-dust one ounce; put the  ish glue intai a glazed pip-
 i, with water, upon, a slow fire; and after you have
 mixed your ingredients, put it into the pipkin, and boil it
 4ap; and what hangs together, use ; if you mix it up with
 finely powdered glass, of any colour, you mayfform it to
 what shape y.ou will; and when cold and dry, it will he
 as hard as stone.
          Another Cenzent, which dries quickly.
   TAK E pitch, as much as you will; melt it, and tnit t
with brick-dust and litharge; and, to make it harder,
moisten the brick-dust first with sharp vinegar and a larger
quntity of the litharge, and it will b as hard as stoae.


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