L'l^! V OF 'OASES, &C 



The muriatic By means of the muriatic folulion of tin, which' has- the 



folntion of tin . . , , . . * , . . . 



tvk.es up the ox- P ro P ert y °' taking the oxigen from many vegetable, animal, 



ides ot'iron and and mineral fubftances, and which,"on this account," is- very 



o, ma gau.i.. u f e f u i Jn dying, as welt as in calico-printing. Wemaydif- 



colour and diflblve inftantly the deepen* oxide of manganefe 



and. of iron, which proves the preponderating affinity of '"iih 



towards oxigen beyond that of manganefe of of iron. 



N. B. There is no reafon to object to fteeping the marked 

 goods in an alkaline ley ; the operation is fpeedily made with- 

 out feniible lofs of potath or of foda, if the operation of lix- 

 iviating be immediately proceeded upon, for which the re- 

 mainder of the ley may be ufed. And generally, if the 

 practice be ufed which has been adopted for a number of 

 years, of rendering the alcalies cauftic with quick-lime, the 

 faving will be confiderable and with better effect. 



, , , , , ,. — _^-- 



Alll. 



Aoff on the Formation of Water by mere. CompreJJlon; ivith 

 Reflections on the Nature of the fileclric Spark. Bj/ M. 

 • 'Brer * ■■'•SM***^ 4 '^ '^ 



That oxigen IT was fome time ago that, in converfation with M. Ber- 

 ma* unite?™ thollet on the nature and properties of heat, I communicated 

 preflur*. to him the perfuafion I had, that the combination of hidrOgen 



and oxigen gafes might be determined without the aid of 

 electricity, and merely by a very rapid compreffion. This 

 remit appeared to me- a confequencc fo immediately follow- 

 ing the obfervations already made on the heat difengaged 

 from air by compretfton, that I thought it needlefs to afcertain 

 it in any other manner. But having iince converfed with Mr. 

 La Place, he appeared fo intereiled asftrongly to urge me to 

 ^ a verification. I therefore made the experiment, which com- 



pletely fucceeded. "It w r as made in the cabinet of the Poly- 

 technic School. I am greatlv indebted to M. Haffenfratz, 

 (uofeflbr of natural philofophy in that eftablimment, for the 



Read to the National Indicate of France, and inferred in the 

 Annales de Ghimie. LIU. 321. 



•great 



