314 -A Jl mf a y cn Bleaching. 



a proportional diftance from each other. After the {learning 

 it mult be immerled in a ley of oxygenated muriatic acid, 

 and fhould be then put into bags to be rinfed in running 

 water: it is next to be expofed to the light, fpread out on 

 large (beets : in the laft place, it muft be made to pafs 

 through fulphuric acid, and the matter will then have ac- 

 quired the moft beautiful degree of whitenei's poffible to be 

 given to it. 



The property which the oxygenated muriatic acid has, 

 when in the date of gas, of expelling the carbonic acid from 

 its faline combinations, a property which it Hods not poflefs 

 in the liquid ftate, gives reafon to beiieve, that if the pulp, 

 after being fubjected to the vapour a fecond time, were ex- 

 posed in an apparatus or chamber where it might be fubjected 

 to the action of the gas, the carbonic acid (formed by the 

 carbon arifing from the burning of the colouring matter in 

 the firft ley, and by the oxygen which combined itfelf to it 

 during the immerfion in the oxygenated liquor.) would be 

 expelled from the combination which might have been 

 formed during the fecond ley, and the rags would be imme- 

 diately bleached without having rccourfe to expofure on the 

 grafs. In all cafes it muft be obferved that this procefs pre- 

 sents an incalculable advantage, by pointing out the means 

 of employing the coarfeft and dirtieft cloth and rags to be 

 converted into pulp of the firft quality : befides, this procefs 

 combines ceconomy with fpeed. It is to be remarked, that 

 in ufing two leys it is of efiential importance to rinfe the rags 

 when taken from the firft : their fibres are then more re- 

 laxed, and their diftention permits the water to carry away 

 and diflblve the dirt and colouring matter attacked by the 

 alkaline vapour : in the la ft place, they muft be made to pafs 

 through acidulous water in order to expel, by the action of 

 fulphuric acid, the acid of the oxygenated muriate of potafh 

 from its combination with the alkali. I muft here alfo call 

 the attention of the intelligent manufacturer to the employ- 

 ment of the refufe arifing from the beating and heckling of 

 hemp and flax : thefe iubftances, treated by this method, 

 would furnifh valuable materials for the fabrication of paper. 



The reader will recollect that, about eight years ago, a 

 propofal was made for regenerating old paper by employing 

 it again in the manufacturing of new. This procefs, which 

 has been repeated with fuccefs, was neglected in France, 

 while it was received with intereft in foreign countries. . At 

 prefent we muft aftert our right to this difcovery, and prove 

 the portability of rendering it ufeful by employing the effect 

 of the alkalino-cauftic vapour, 



When 



