generated from Aluminium Electrodes. 



781 



T. 50 parts N 2 + 32 parts H 2 . 



V- 



V. 



p-Y. 



m . 10~ 3 mm. 



1100 volt. 



3449 . 10" 3 



46 





1900 



4020 



40 





2800 



4480 



36 





3800 



5280 



32 





5600 



5732 



29 





6700 



5948 



27 





8800 



6416 



26 





10400 



7028 





II. 21 parts N 2 + 29 parts H 2 . 



64 





1100 



4504 



52 





2100 



5676 



44 





3300 



6388 



38 





4600 



6640 



33 





8000 



8384 



26 





12800 



8652 





III. 16 parts N 2 + 12 parts H 2 , 



84 





1200 



8467 



66 





2300 



10020 



56 





3400 



10660 



50 





4800 



12000 ■ 



46 





6000 



12696 



42 





80U0 



14112 





IV. 52 parts He -4- 18 parts II 2 . 



196 





1200 



46096 



158 





2450 



53704 



132 





3600 



52580 



114 





4-100 



57180 



110 





5000 



60500 



105 





6000 



65148 



92 





9100 



77020 



80 





13200 



84480 



At the end of series IV. the gas at a pressure of '08 mm. 

 was subjected to volatilizing calcium. A residue of '012 mm, 

 was left, corresponding to 52*5 per cent, of helium, which is 

 very nearly the original composition. 



To compare with these results, the values given by the 

 unknown gas (taken in another tube) are given within a 

 wider range than previously tested (p. 782). 



The constancy of p 2 Y here as compared with the in- 

 constancy in the case of mixtures make it extremely 

 probable that the unknown gas is a definite chemical 

 body. 



