IQQ ON OXIMURIATIC ACIB. 



the very circumstance held to be essential to its success. Andl 

 still with this variation part of the carbonic oxide is con- 

 verted into carbonic acid, 

 TFarther expc- 1 have now to state the results of the experiments I have 



limentssub- performed, substitutinj' ammonia for water, in examining 



sntutmg am- \ . . ^ , , 



monia for wa- the product of the n^utual action of the gasses. 1 was as- 



**^^* sisted as before in making these experiments by my friend 



Mr, Ellis, and the results were witnessed by some other 

 friends. 



Cxp. 1. Ten measures of carbonic oxide gas, and 10 measures of 



hidrogen gas, each of which had been previously dried by 

 exposure to lime, and ^20 measures of oximuriatic acid gas, 

 obtained from a mixture of muriate of soda, black oxide of 

 manganese, and diluted sulphuric acid, and which had 

 been kept in contact with muriate of lime, were mixed to- 

 j^ether in an apparatus fitted with stopcocks, so that the 

 gasses could be transferred and mingled without the inter- 

 vention of water or of quicksilver. The mixture was ex- 

 posed to light, excluding the direct action of the solar rays, 

 for about 36 hours. At the end of that time, the apparatus 

 being opened under dry quicksilver, a small quantity only 

 entered, indicating a very inconsiderable diminution of vo- 

 lume; and the quicksilver acquired a slight tarnish, a proof 

 of the presence of a small portion of oximuriatic acid. The 

 gas was transferred through dry quicksilver into an inverted 

 jar'; and ammoniacal gas, which had been previously dried 



Carbonic wild by exposure to lime, was added to it. Dense white vapours 



apparency v/e.re abundantly produced, and the introduction of the am- 

 prodttced, . i p • , , ■ 



monia was renewed irom time to time, until their produc- 

 tion had ceased. A little water was then introduced to ab- 

 sorb the excess of ammonia, and dissolve the concrete salt 

 that had condensed. The solution was rendered turbid by. 

 the test of muriate of barytes, indicating the production of 

 carbonic acid*. 



I soon 



Presence of ♦ In hoine experiments this result -was not obtained, or the traaspa< 



carbonic acid rency of the solution was at least little impaired. To discover the cause 

 not always im- ^^ ^j^j^ j ^^^ dissolved small portionsof muriate and carbonate of ammo- 

 medrately per- , .,..., , , . , , 



ceptib!e, "'* '" water, thus preparing a solution similar to that which I suppo'-.ed 



to be formed in the experiment j but on adding to it muriate ef barytes 



there 



