Bleaching ly the Muriatic Acid. 371 



accompanied with a sealed paper, containing the same de- 

 vice, with the name and address of the author. This paper 

 will only be opened in the event of the memoir to which it 

 belongs being found to merit one of the prizes. 



FRENCH NATIONAL INSTITUTE. 



At the meeting of the above learned society, on the 7th. 

 of July last, M. Biot read an essay on the changes occa- 

 sioned in bodies by the action of light ; and count Rum- 

 ford read a treatise on the adhesion of the particles of water 

 to each other. 



SOCIETY OF ARTS AND SCIENCES OF HAERLEM. 



The new king of Holland has undertaken the presidency 

 of the above society, and in future its title is to be " The 

 Royal Society of Haerlem." 



LXIIT. Intelligence and Miscellaneous Ai tides. 



BLEACHING BY THE MURIATIC ACID. 



JL/oubts having been started on the advantages of this 

 process, the following publication appeared on the subject 

 in the Moniteur of the 16th of May, 1 806. 



Messrs. Descroizilles, bleachers, after Berthollet's method, 

 at Rouen, having been consulted by the prefect of the 

 Lower Seine department, were desired to found their report 

 upon the opinion of one of the most celebrated calico-printers 

 in Europe, M. Oberkampf. The result of their application to 

 M. Oberkampf, as contained in the answer of M. Widmer, 

 his nephew, who directs the manufactories, was; that for 

 these fifteen years past, M. Oberkampf has constantly used 

 this process for bleaching linens and cottons, both mixed 

 and unmixed, and that they always assumed much stronger 

 colours than when bleached by the old process. " It is 

 true," says M. Widmer, " that there are many pieces of 

 cloth in the market extremely ill bleached ; England in par- 

 Ji b 2 ticular 



