Pressures of Saturation of Oxygen. 



461 



sponding temperatures than for such as are non-associating, 

 we can deduce from (2) that /for the first-named bodies must 

 be greater thau its normal value. Similarly with equation (3). 

 In the following tables I give the values of / for dif- 

 ferent bodies in the column of pressures corresponding to 

 pressures of oxygen lower than one atmosphere, then at low 

 pressures; the ratios of absolute temperatures at corresponding 

 pressures to the absolute critical temperatures of six of these 

 bodies (viz., fluorbenzene, ether, acetic acid, and the three 

 first alcohols) are calculated and published by Prof. S. Young*, 

 wherefrom it can be seen that these substances do not really 

 agree as regards the reduced curves. 



Oxygen. (Crit. const, of Olszewski.) 



No. 



Temperature. 



/. 



No. 



Temperature. 



/• 



1 



-210-6 



2-477 



8 ... 



-198-7 



2-440 



2...... 



-209-8 



2-476 



9 ... 



-196-25 



2-454 



3 



-208-9 



2-471 



10 ... 



- 1940 



2-451 



4 



-2068 



2-445 



a ... 



-190-5 



2-463 



5 



-204-8 



2-446 



12 ... 



-185-8 



2-481 



6 



-2034 



2-440 



I 13 ... 



-183-3 



2 J 488 



7 ... 



-201-1 



2-442 



14 ... 



-182-2 



2-467 



Ethylene. (Crit. const, and vapour-pressures of .Olszewski.) 



No. 



Temperature. 



/• 



No. 



Temperature. 



/• 



1 



-150°-4 



2-752 



7 ... 



-122°-0 



2-778 



2...... 



-148-0 



2-787 



8 ... 



-115-5 



2-763 



3 



-1390 



2-788 



9 ... 



-1110 



2-749 



4 



- 132-0 



2-824 



10 ... 



-1080 



2-724 



5 



-129-7 



2-806 



11 ... 



-1050 



2-710 



6 



- 1260 



2-777 









Water. (Crit. const, of Battelli, 



vap.-pres. of Zeuner.) 



No. 



Temperature. 



/• 



No. 



Temperature. 



/. 



1 



o 

 +30 



3-328 



8 ... 



+ 75 



3-260 



2 



+35 



3-319 



9 ... 



+ 85 



3-248 



3 



+40 



3-311 



10 ... 



+ 95 



3-236 



4 



+45 



3-303 



11 .. 



+ 105 



3-226 



5 



+50 



3-298 



12 ... 



+ 115 



3216 



6 



+55 



3-287 



13 ... 



+ 125 



3208 



7 



+65 



3-273 



14 ... 



+135 



3200 



* Phil. Mag. [5] xxxvii. p. 3 (1894). 

 Phil Mag. S. 5. Vol. 40. No. 240. Nov. 1895. 



2 K 



