35S ANALYSIS OF AMMONIA. 



were produced, a quantity always inferior to iliat cvolvqd by 



the action of an equal portion of the metal upon vvater. In 



the distillation from 1 1 to 17 cubical inches of elastic flyid 



were evolved, and from \-5 to 2'5 grains of potassium rege-? 



Derated. 



Ivrastammo- The quantity of ammonia in the products varied from a 



?iia wliere ,• .1 * ■ •. , ^n \ 



least water. portion that was scarcely perceptible to one twellth or one 



thirteenth of the whole volume of elastic fluid: and it was 

 l«iast ill those cases m which the absertce of moisture was 

 most perfectly guarded a<>-ainst. Under these circumstan- 

 ces likewise more potassium was revived; and the unabsorb- 

 able elastic fluid, and particularly the hidrogen in smaller 

 proportion. 

 Most nit logen When the products of distillation were collected at dif- 

 »t ust. ferent periods, it was uniformly found that the proportion 



of nitrogen to the hvdrogen diminished as the process ad- 

 vanced. 



The ftrst portions coiitained considerably more nitrogen 

 in proportion, than the gasses evolved during the electriza- 

 tion of ammonia, and the last portions less. 

 *j;5;i>€rinient. I shall give the results of an experiment, in which th« 

 gasses produced in distilUttion were collected in four difitrent 

 vessels, and in which every precaution was lal^eu to avoid 

 sources of inaccuracy., 



The barometer was at 29'8, thermometer 65° Fahren- 

 heit, 

 fompound of 6 grains of potassium absorbed 12 cubic inches of well 

 potassium and (jned amrponia. The metal was heated in a tray of platina, 

 ainmonia , , ... ^ i- 1 ^ 1 



healed, ^"" ^"<^ g^^ contauied m a retort ot plate glass. 



hidrogen pro- 5*8 cubical inches of hidrogen were produced. 



t^^!^: , The fusible substance was distilled in an iron tube of the 



r usible sub- 

 stance disti'u- capacity of 3 cubical inches and a half tilled with hidrogen, 



^^ the'adaptors connected with the murcurial apparatus con- 



tained '8 of common air. 



1st portion of The hrst portion of gas collected (the heat being very 



fi^'" slowly raised, and long before it had rendered the vessel 



red), equalled 7 5 cubical inches. It contained '6 of am- 

 monia, 7 of the residuum detonated with 4j of oxigen gas 

 lei't a residuum of 4. , 



*d. The second portion-, equal to 3 cubical inches, contained 



n© 



