1282

VERMILION.

/. Into another tub, called tlie blue back, there is to be introduced, in like in , or j t 6Sfor every six pailfuls of the acidified schlam, 15 similar pailfuls of a solution of e°clear caustic alkali, at 19° Baume. , j„to i 1

g. When the back (e) has remained long enough at rest, there is to be pourea pail of pure water for every pail of schlam. . , a nd

A. When all is thus prepared, the set of workmen who are to empty the back ( » ethose who are to stir (/), must be placed alongside of each. The first set tra*jschlam rapidly into the latter back ; where the second set mix and agitate it all jg t o

requisite to convert the mass into a consistent state, and then leave it at rest l f48 hours. t wit' 1

The whole mass is to be now washed; with which view it is to be stirred ab q'bi sthe affusion of water, allowed to settle, and the supernatant liquor is drawn o ■ q-jjeprocess is to be repeated till no more traces of potash remain among the hideposite must be then thrown upon a filter, where it is to be kept moist, and ^ ^.jedfreely to the air. The pigment is now squeezed in the filter-bags, cut into * > ‘ 1 *’.* perin the atmosphere, or at a temperature not exceeding 78° Fahr. It is onlymost complete desiccation that the color acquires its greatest lustre. cvli n ^ er h

VERMICELLI, is a paste of wheat flour, drawn out and dried in slender ^ j. rea cbmore or less tortuous, like worms, whence the Italian name. The gruau of t. ( park

is wheat coarsely ground, so as to free it from the husk ; the hardest and

this

being separated by sifting, is preferred for making the finest bread. When . nCj ih fiis a little more ground, and the dust separated from it by the bolting*®* pastesgranular substance called semoule is obtained, which is the basis of the ve f’

The softest and purest water is said to be necessary for making the most jt

micelli dough ; 12 pounds of it being usually added to 50 pounds of s f tn ad 0better to add more semoule to the water, than water to the semoule, ® .jj w arn Vkneading. The wsfter should be hot, and the dough briskly worked well

The Italians pile one piece of this dough upon another, and then treaa . our s "'fib „their feet for two or three minutes. They afterwards work it for two h en( j tl>® _powerful rolling-pin, a bar of wood from 10 to 12 feet long, larger at the o j, nea di D =the other, having a sharp cutting edge at the extremity, attached to the l ar =trough. c y]inde rS ’ ^

When the dough is properly prepared, it is reduced to thin ribands* > er foi®tubes, to form vermicelli and macaroni of dilferent kinds. This operation car r ' e “ ffe .by means of a powerful press. This is vertical, and the iron plate or soilo ^ sa usarthe end of the screw fits exactly into a cast-iron cylinder, called the belli 1* an j siz e Imachine, of which the bottom is perforated with small holes, of the snap g re t o 1 ,tended for the vermicelli. The bell being filled, and warmed with a c ! ialC ^ ( j] a telythe dough into a paste, this is forced slowly through the holes, and is imm e aC( j U jredand dried by a fanner as it protrudes. When the threads or fillets still “ '

length of a foot, they are grasped by the hand, broken olf, and twisted, t (

ble, into any desired shape upon a piece of paper. v ermi ce ^'" , a rds

The macaroni requires to be made of a less compact dough than which are aft^eformer is forced through the perforated bottom, usually in fillets, whi e t0 heformed into tubes by joining their edges together before they have ha ^

dry. The lazagnes are macaroni left in the fillet or riband shape. tbe V r °V°L of

VERMILION, or Cinnabar , is a compound of mercury and sulphui coB)B1 on °..j oa .of 100 parts of the former to 16 of the latter, which occurs in nature a o p Ver®^ e% ,quicksilver, and is prepared by the chemist as a pigment, under —pound b® 1 J r edIt is, properly speaking, a bisulphuret of mercury. This artificial 'f or n)ak in = e r-tensively employed, on account of the beauty of its color, in P ain f a( jture. ^-? e ral>l e•sealing-wax, and other -purposes, is the object of an important.manu ^ of c ° nSI hro vfn ’milion is prepared by means of sublimation, "it concretes in uf’L nJ teX ture; oS ur elhickness, concave on one side, convex on the other, of a needle- c0 [ 0 r.ish-red in the lump, but when reduced to powder, of a lively re ^ not conta® h ] a eto a moderate heat, it evaporates without leaving a residuum, 11 1 affa y, ' vltwith red lead: and at a higher heat, it takes fire, and burns en in

flame. ... n from being ""fists

Holland long kept ajnonopoly of the manufacture of vermin?* f teach na ti« nSpossession of the art of giving it a fine flame color. , ean .^/failure of ot ®? rt |ioll et ’examined this product with great care, under an idea that tne me with o \ tliafto rival the Hulch arose from ignorance of its true composition ’ cro y, beh e bot j 1 olimagined that it contained a little hydrogen ; and others, witn . proved t 11 " b ydr0'the mercury contained in it was oxydized ; but, eventually, fee hand> that n ^ tlia ithese opinions were erroneous; having ascertained, on tne an( j 0 n thegenous matter was given out in the decomposition of cmna. *