3. (Red.) To each pound of the above add whiting (dry), 3 oz., and light
red (burnt ochre), 4 oz.; or red bole, q. s. (all in fine powder).
4. (Black.)--_a._ To each pound of No. 1, or No. 2, add ivory black (bone
black), q. s.
_b._ From black pitch, 6 lbs.; ivory black and whiting of each, 1 lb.;
melted together. Used in the same way as common sealing-wax for bottle
corks, cask bungs, &c. See CEMENT, MAISSIAT'S.
=Cement, Brim'stone.= Melted brimstone, either alone, or mixed with resin
and brickdust. Cheap and useful.
=Cement, Bru'yere's.= Clay, 3 parts; slaked lime, 1 part; mix and expose
them to a full red heat for 3 hours, then grind to powder. Recommended as
an hydraulic cement.
=Cement, Build'ing.= _Syn._ ARTIFICIAL PUZZOLENE'. From a mixture of clay
or loam, broken pottery, flints, or siliceous sand, or broken bottle
glass, and wood ashes, exposed to a considerable heat in a furnace, until
it becomes partially vitrified; it is then ground to fine powder, sifted,
and mixed with one third its weight of quick-lime, also in fine powder,
after which it must be packed (tight) in casks to preserve it from the air
and moisture. For use it is mixed up with water and applied like Roman
cement.
=Cement, Cap.= _Prep._ 1. Resin, 5 lbs.; beeswax and dried Venetian red,
of each 1 lb.; melted together.
2. (C. G. Williams.) Equal weights of red lead and white lead. Used for
chemical and electrical purposes. For cementing glass tubes, necks of
balloons, &c., into metal mountings. No. 2 is preferable to white lead
alone, and may be depended on for temperature up to 212°.
=Cement, Cheese.= From grated cheese, 2 parts; quick-lime (in fine powder)
1 part; white of egg, q. s.; beat to a paste. Used for earthenware, &c.
=Cement, Chem'ical.= _Syn._ SOFT CEMENT. _Prep._ From yellow wax, 4 parts;
common turpentine, 2 parts; Venetian red (well dried), 1 part; melted
together. Used as a temporary stopping or lute for the ends or joints of
tubes, which are not exposed to much heat; as in alkalimetry, &c. See
CEMENT, ELECTRICAL.
=Cement, Chi'nese.= _Syn._ SHELL-LAC CEMENT, LIQUID GLUE. _Prep._ 1.
Finest pale orange shell-lac (broken small), 4 oz.; rectified spirit
(strongest), 3 oz.; digested together in a corked bottle in a warm place
until dissolved. Very strong and useful; almost odourless. It should have
about the consistence of treacle.
2. As before, but using rectified wood naphtha as the solvent. Inferior to
the last, but excellent for many purposes.
3. (Without spirit.) _Prep._ Borax, 1 oz.; water, 3/4 pint; shell-lac, 3
oz.; boil in a covered vessel until dissolved, then evaporate to a proper
consistence. Cheap and useful, but dries slowly.
4. Macerate for several hours, 6 parts of glue, in small pieces, in 16
parts of water; then add 1 part of hydrochloric acid, and 1-1/2 part of
sulphate of zinc; and let the mixture be kept for 10 or 12 hours at a
temperature of 68° or 70° C.
_Uses, &c._ Employed to mend glass, china, fancy work, jewelry, &c., for
which it is only inferior to Armenian cement. The first formula produces a
cement so strong that pieces of wood may be joined together, cut slopingly
across the grain, and will afterwards resist every attempt to break them
at the same place. In many of the islands of the Indian Ocean, in Japan,
China, and the East Indies, a similar cement is used to join pieces of
wood for bows, lances, &c. The fluid is thinly smeared over each face of
the joint, a piece of very thin gauze interposed, and the whole pressed
tightly together and maintained so until the next day. Joints so made will
even bear the continual flexure of a bow without separating. It is
admirably adapted for fishing rods. The product of the second formula is
commonly sold as LIQUID GLUE. That of the last is much used by the
druggists and oilmen, instead of gum, for fixing paper labels to tin, and
to glass when exposed to damp.
=Cement, Cop'persmiths'.= _Syn._ BLOOD CEMENT. From bullock's blood
thickened with finely powdered quick-lime. Used to secure the edges and
rivets of copper boilers, to mend leaks from joints, &c. It must be used
as soon as mixed, as it rapidly gets hard. It is cheap and durable, and is
suited for many other purposes.
=Cement, Curd.= _Prep._ 1. The curd of skimmed milk (obtained by the
addition of vinegar or rennet) is beaten to a paste with quick-lime, in
fine powder.
2. Add vinegar, 1/2 pint, to skimmed milk, 1/2 pint; mix the curd with
the whites of 5 eggs; well beaten and powdered quick-lime, q. s. to form a
paste. Used for mending glass and earthenware; they resist water and a
moderate degree of heat.
3. Rub from two to four parts of the curd, with a cold solution of borax,
till a thick liquid is obtained, that becomes clear on standing. This is
an excellent cement for artificial meerschaums, and may be used to give
consistency to silk goods, or to coat artificial flowers, and court
plaster, to the latter of which it imparts more adhesiveness and firmness.
=Cement, Cut'lers'.= _Prep._ 1. Black resin, 4 lbs.; beeswax, 1 lb.; melt,
and add finely powdered and well-dried brickdust, 1 lb.; mix well.