220 



Mr. William Sutherland on the 



Table VI. 



(Values of pv/p'v' at high volumes for C0 2 .) 



(p = 5'7 metres of mercury : v = 2v'.) 



Temperature 



50°. 



100°. 



200°. 



1-0040 

 1-0026 



300°. 



Araagat 



1-0145 

 1-0156 



1-0087 



1-0092 



10020 

 1-0000 



Calculated 



As the experiments are not free from liability to an error of 

 1 in 1000, the agreement is again close enough to prove the 

 applicability of the equation at high volumes. 



In the sequel it will be shown that this equation applies to 

 the great majority of compounds, but meanwhile the only 

 other experimental determinations similar to those already 

 discussed for ethyl oxide and carbonic dioxide are Amagat's 



and C 2 PL ; Roth's for S0 2 and NH 3 (Wied. 



forH 2 ,p 2 ,N 2 ,CH, 

 Ann. xi.) ; Janssen's for N 2 (Wied. Beibl. ii.) ; and Ramsay 

 and Young's on methyl and ethyl alcohol (Phil. Mag. Aug. 

 1887). Our form of characteristic equation applies to 

 S0 2 , NH 3 , and N 2 successfully, but not to H 2 , 2 , No, and 

 CH 4 , which require a still simpler type, the alcohols 

 other hand requiring a less simple type. These 

 values of k and I for S0 o , NIL, and N 2 : — 



'2> 



on 

 are 



the 

 the 



25 



S0 2 . 

 2-08 

 2740 



NH 8 . 



4-8 

 22040 



N 2 0. 

 2-3 



3420 



with which the following pressures have been calculated for 

 comparison with the experimental data, the latter being taken 

 direct from air or nitrogen mauometer without correction for 

 departure from Boyle's law. 



Table VII. 



S0 2 at 99° 



•6. 



KH 3 at 99 c 



•6. 



N 2 at 25°-l. 



! 

 v. 



p exp. 



p caJc. 



v. 



p exp. 



p ealc. 



v. 

 7-0 



p exp. 

 39-1 



p calc. 



41-9 



7-9 



8-0 



172 



7-6 



7-6 



37-2 



176 



17-1 



170 



85-7 



14-8 



14-7 



5-36 



42 6 



424 



13-6 



2V2 



20-8 



654 



18-8 



18-9 



3-78 



43-9 



467 



99 



26-0 



26-2 



40-0 



28-6 



291 









At 183° 







At 183° 





At 43° -8. 



18-2 



21-7 



220 



160 



10-3 



102 



5-85 



49-4 



47-9 



10-0 



373 



369 ! 



81-6 



198 



19-6 



462 



55-6 



544 



4-58 



69 2 



67-5 



36-1 



409 



42-1 



347 



61-4 



61-0 



2-75 



98-2 



93-5 ' 



16-2 



82-6 



85-4 



2-82 



641 



64-3 



