ZIRCONIA.
133d
°f & any required pressure, by depressing the screws m, m, or by the employmentp 6l ghted levers, if that should be thought necessary,fold ' s tbe last finish of cloth to give it a smooth level surface. The piece is
boa i backwards and forwards in yard lengths, so as to form a thick package on thepj r<1 of a screw or hydraulic press. Between every fold sheets of glazed paper arethe to P revent the contiguous surfaces of cloth from coming into contact; and atpi en< l of every twenty yards, three hot iron plates are inserted between the folds, theshe CS ''a'a" la* 1 ! side by side, so as to occupy the whole surface of the folds. Thintheh * ron not la ea ted are also inserted above and below the hot plates to moderate.? ea t- When the packs of cloth are properly folded, and piled in sufficient numberthe | P ress > tbey are subjected to a severe compression, and left under its influence tillthe S lates " et cold. The cloth is now taken out and folded again, so that the creases ofSe e or| ner folds may come opposite to the flat faces of the paper, and be removed by aMth"^ Pressure. In finishing superfine cloths, however, a very slight pressure is givenst t j Iron plates but moderately warmed. The satiny lustre and smoothness given byc 0 a? compression with much heat is objectionable, as it renders the surface apt to bew ^Potted and disfignred by rain.
iJOTZ, is the Indian name of steel.
\Vr\ T, the fermentable infusion of malt or grains. See Bkf.r.p 0s OUEFE’S APPARATUS, is a , series of vessels, connected by tubes, for the pur-.\ C[ condensing gaseous products in water. See Acetic Acid , fig. 1 ; also Muriatic
X.
i^ANthine, is the name given by Kuhlmann to the yellow dyeing-matter contained^dder.
Y.
Yp^ST, is the froth of fermenting worts. See Beer and Fermentation.ftJeni L0W HYE. (Teinturc janne, Fr.; Gelbfdrben, Germ.) dhinotlo, dyer’s-broom,W«rr'* a ) fustic, fustet, Persian or French berries, quercitron bark, saw-wort,
of- th atula tinctoria,) turmeric, weld, and willow leaves, are the principal yellow dyes,. Ve getable kingdom ; chromate of lead, iron-oxyde, nitric acid, (for silk,) sulphuretRrtjji lnt °ny, and sulphuret of arsenic, are those of the mineral kingdom. Under these
llrih 3.S alert linnoe Pirrrn nn TXT'Pivr' Tlirrxwr' ann lM/tBniXT're arrmla ineirnrtfinne
MU t S> as also under Calico-printing, Dveing, and Mordants, ample instructionsAli Jrn - found for communicating this color to textile and other fibrous substances.Hu n i ( . ltUl and oxyde of tin are the most approved bases of the above vegetable dyes. Ar Pil ' a *lye may be given with i ~
i.. °cess. See Madder.
b,
with bablah, especially to cotton oiled preparatory to the TurkeyYfif T ess ' ® ee Madder.
y-ptLOW, KING’S, is a poisonous yellow pigment. See Arsenic and Orpiment.'eij,^ ia lA, is a rare earth, extracted from the minerals gadolinite and yttrotantalite,5 aa oxyde of the metal yttrium.
Itl ' v rinl!u ‘ s t * le root °1' a pl ant which grows in Malabar, Ceylon, &c. It occurst^bt 0 1 Pisces, externally ash-colored, internally brownish-red; possessed of a fra-u com-° r ’ some what resembling camphor; and of a pungent, aromatic, bitterish taste.i.'60 of ltls > according to Bucholz, 1-42 of volatile oil,‘of a burning camphorated taste;JjUle rp a s °ft, bitter, aromatic resin; 11-75 of a bitter aromatic extract, mixed with a•0 0 f Sltl and potash-salts; 4-5 of gum ; 9 of vegetable mucilage; 3-60 of starch ;’1'2 of starc hy extract from the woody fibre, by means of caustic potassa, along with'Us r o 0 . aaot ber matter, 12-89 of woody fibre, and 15 of water. According to Morin,t ^iiVlOMc- ta - ns ’ besides, an azotized substance, analogous to the extract of beef,b* identit • ls a P r i rlc C’l e supposed by Taddei to exist in the gluten of wheat-flour.
y.s not recognised by later chemists.
^Rcontt ' t ’ ee Hyacinth and Lapidary.*
oxy,] is a face earth, extracted from the minerals zircon and hyacinth; it is
f ese ln kr lrconiu m. a substance possessing externally none of the metallic characters,‘“Wee D ln = rat,, er charcoal powder, which burns briskly, and almost with explosive
til