.118 New Method of Bleaching 



the Royal Society, that the world is indebted for the esta- 

 blishment of the Royal British Institution, which pro^ 

 mises to be of the greatest public benefit. 



To conclude : The different productions of count Rumford 

 on scientific subjects, published in the Philosophical Trans- 

 actions and in separate essays, are so well known to the public 

 that any enumeration of them in this place is unnecessary. 

 His writings are also well known on the continent ; indeed 

 many of them have been translated, and from all of them 

 large extracts have been given in different European languages. 



XLI. Account of Messrs, Turnbull and Crook^s 7ieiu 

 Met hod of Bleaching or Whitening and Cleansing Cotton- 



' Wool, Flax, Hemp, &c. and Goods manufacttired from 

 any of these Materials , 



J. HE inventors of this method have secured the same by 

 patent, and the present account is extracted from their spe- 

 cification. 



The goods to be bleached or cleansed are directed to be 

 first washed, and freed from the dirt and foreign matters that 

 may be adhering to them, and from any kind of paste or 

 dressing (as the workmen call it) which may have been used 

 in their manufacture. This is to be performed by mill-washing 

 or any of the usual processes. 



When thus cleansed they are put into a lye of vegetable or 

 of mineral fixed alkali, or of the volatile alkali, cither mild or 

 made caustic by quicklime, or into a lye of quicklime only, 

 or into a soapy lye, or into a lye composed of all or any of 

 these substances, (with or without the addition of oxygenated 

 muriatic acid,) of a strength fit for the purpose of extracting 

 the coloured or colourless gumm.y, resinous, or other impuri- 

 ties which may exist naturally in, or which may have been 

 introduced (by accident or design) into the fibre or texture of 

 the materials or goods under process, and which are too inti- 

 mately united with them to admit of being removed by the 

 first above-described washing or cleansing. The alkaline, 

 soapy, or other lye may be prepared by the method or me- 

 thods 



