Variation in the Pressure of Saturated Vapours, 79 

 2nd Method. 



t. 



P- 



dp 



dl' 



t. 



P- 



dp 



dl' 



o 



135 



4964-22 

 5674-59 

 6458-0 



164-259 



150 



7318-40 

 8259-19 



179-986 

 196-454 



140 



155 



145 







The differential coefficient (-£) 179*986, in the absence of 

 observations above 155°, was calculated by formula -J-^ only, 

 and the differential coefficient 196*454 by formula -^ only. 



c— <?, 



145° 150° 155° 



133-22 191-33 189-44 



1-89 1-89 



0-378 0-378 



The figures 0*378 and 191*33 do not differ from those 

 found above. 



t. 



Pressures. 



t. 



Pressures. 



Calculated. 



Observed. 



Calculated. 



Observed. 



o 



-20 .. 



20 

 50 

 80 



1-71 



37-31 

 206-80 

 800-06 



3-34 



44-46 



219-90 



812-91 



100°.., 

 120 

 130 

 140 



1689-4 

 3229-8 

 4322-4 

 5674-3 



16976 

 32317 

 43320 

 5674-6 



Sulphur. 



21. 1st Method. 



t .... 400° 480° 



x 0-605 3-5244 



x attains a maximum at 550°. 



2 



520° 

 4-4393 



540° 550° 

 4-9409 5-0616 



560° 

 4-9683 



c- Cl =5-0616x^ =0-15817. 

 64 



According to Personne, between 119° and 147°, c= 0*2346; 



