arid Djeing Turlry "Red. Sdf 



finfced-oil, with which the alkaline fohition of alumine 

 formed a kind of miikv liquid *. r^s the oil gradually Jcpa- 

 ratcs itfcif from this mixture under the appearance of creani, 

 'it mult not be emplovcd till it is again ftiaken. The ikains 

 of cotton or linen ought to be fucccHivcly immerfcd in it, 

 and equally prcired, that thev may be then expofed to dry on 

 a pole in the order in uhich thev have been taken from the 

 mixture. They niuft be dried under Ihclter from rain in 

 fummer, and in a warm place in winter, and be left in that 

 Itate for twenty-four hours : they mult then be wafiied in 

 very pure rimning water, and be again dried ; after which 

 they are to be immerfed in an alkaline ley, prclfed and dried 

 a fecond time in the fame manner as the tirft, taking care, 

 however, to recommence the innnerfion in the ley with thofe 

 llcains which have been lall in the oily mixture, becaufe the 

 firlt never fail to carry awav a larger portion than the lalt : it 

 will be proper alfo to confume the mixture each time, that it 

 may not have leifure to aitracl; the carbonic acid with which 

 tlic lower region of the atmofphere is always charged, efpe- 

 cially in nianuf^Aories ; for the alkali, bypaffing to the Itate 

 of carbonate, fuffers the alumine to be precipitated, and lofes 

 the property of mixing with the oil. 



Two immerfions in the alkaline folution of alumine mixed 

 with linfced-oil will be fufHcient to obtain a beautiful red ; 

 hut, by continuing to impregnate the (kains a third and even 

 a fourth time with the fame circumflances as the firll:, colours 

 exceedingly brilliant will be produced. 



The inlenfilv of the red propofed to be obtained will be in 

 proportion to the quantity of the madder employed. By 

 taking a quantity of madder equal in weight to that of the 

 fkains the refult will be a red, which, by clearing, will be 

 changed to a rofy (hade: on the other hand, fliades of crim- 

 fon, more or lei's bright, will be obtained by employing two, 

 three, and even tour times the weight of madder, without 

 ever forgetting the addition of chalk, if the water employed 

 docs not contain fome of it. Four parts of this colouring 

 fubllance will produce a red too intenfc and beautiful to be 

 employed in connnerce, as it would be too dear to find pur- 

 chafers. 



Bv making an oily alkaline folution of alumine with two 

 or three parts of water, ami impregnating the fkains twice, 

 ant! even f')ur linus, in the manner above mentioned, bright 

 fliades will he produced without the nfe of nuich madder: 

 but ihey will not have the fame intenlity as thofe procured 



• In (afl, a (jj-'unatcou') liquor is fonticJ cuiicaitun^; iluminc— Ein > . 



K 3 with 



