118 METHOD OF BLEACHING PAPER. 



But as, in the lateft treatifes of chemiftry, the ancient procefs 

 of amalgamation is ftill prefcribed, I think it may be ufeful at 

 prefent to recommend the ufe of the mere pulverifed tin. 



Thefe are the details which I find in my notes of that pe- 

 riod ; they (hew that the following proportion is the belt ; 



Inftruftions. Twenty-four ounces of iiiblimate and eight ounces of tin 



yield nine ounces of fuming liquid. 



Conceiving that fome advantage might be obtained by aug r 

 menting the proportion of fublimate, on account of the great 

 excefs of pure and femi-oxided tin which is found in the 

 refiduum, I made the following trial : 



Experiment. Thirty-two ounces of fublimate and eight ounces of tin 



yielded ten ounces of the liquid ; hence i£ appears, that the 

 expenditure of eight ounces of fublimate is not compenfated 

 by more than one ounce more of liquid. 



The acid is noc I (hall fhew, upon another oceafion, that in the fuming 



oxided in the muriate of tin, as well as in the corrofive muriate of mercury, 

 fuming muriate. . . , •,„ , 



the bales only are oxidated at their maximum, whilft the mu- 



- riatic acid remains in its ordinary ample ftate. 



VIII. 



A Memoir on the Method of Bleaching the Pqfte of Paper. 

 By Citizen Loysel *. 



Berthollet's JL HE advantages of the method of Citizen Berthollet for 



bieachmg pro- bleaching thread and piece goods, by means of the oxigenated 

 ' muriatic acid are univerfally known. Citizen Chaptal has 

 ufefully applied this invention, to reftore the colour of prints 

 and printed books; and he has alfo fimplined one of its mofl 

 important parts in his new proceflfes refpecling the art of ap- 

 plying the lixivium. 

 Advantages of The adoption of Citizen Berthollet's method to the art of 

 applying it to paper-making, is capable of carrying this branch of induftry 

 to a ftill greater degree of perfection, particularly in France. 

 We are abundantly fupplied with the raw materials proper foo 

 manufacturing paper; but according to the prefent procefles 

 of our paper mills, there is only a very fmall portion of the 



paper. 



* Tranflated from the Annates de Chimie XXXIX. 137. 



3 rags 



