Relation to Preeeun and Temperature* 



493 



Table 14. 



Compressibility of Caprinic acid, CioH 2 o0 2 , referred to 20 atm. 



MeltiDg point, 30° ; boiling point, 269°. 







Observed. 





Computed 

 y/FxlO 3 









6, L 



P 



v/Vx\0 3 v/Vx\0 3 



/?xl0 6 



Diff. x 10 3 

 



tf x 10 6 



#o xlO 6 



30° 



20 



00 o-o 





0-0 









100 



4-9 5-7 



66 



59 



-•6 



76 



76 



under-cooled 



200 



13-4 129 



73 



12-9 



+ •3 







15-91 im 



300 



19-5 19-8 



71 



19-5 



+ •2 









400 



25-5 25-8 



68 



25-7 



•o 

 •o 







65° 



20 



o-o o-o 



- - _ 











14*39 cm 



100 



7-3 7-0 



90 



7-3 



-•1 



95 



97 





200 



161 15-9 



89 



16-0 



•o 









300 



23-6 239 



84 



23-8 



•o 









400 



314 311 



82 



31-3 



•o 







100° 



20 



o-o 00 







00 



•o 



119 



121 



1685 cm 



100 



8-5 9-1 



110 



9-0 



-•2 









200 



191 20-1 



109 



195 



+ •1 









300 



29-1 28-7 



104 



29-1 



-1 









400 



368 36-8 



97 



37-8 



+ •2 









20 



o-o 



o-o 







o-o 



•o 



200 



20? 



18'30 cm 



100 



153 



15-1 



190 



14-9 



+ •3 









200 



312 



31*1 



173 



312 













300 



45-4 



45-5 



163 



452 



+ 3 









400 



57-4 571 



151 



57-7 



_-4 







Table L5. 



v 

 Thermal expansion of Caprinic acid, —x 10 3 , referred to 30' 



Atm.= 





20 



100 



200 



300 



400 



0= 



30° 

























65 



30 



28 



28 



26 



25 





100 



59 



55 



52 



49 



47 





185 



151 



139 



129 



120 



113 



22. Paraffine. — Results for paraffine are in hand in large 

 number. The best of these are given in tables 16 and 17. At 

 64°, solidification set in at 400 atm., changing the curvature of 

 the isothermal. Supposing the present conditions to hold 

 indefinitely, there would be no contraction on cooling under 

 1200 atm. 



23. Thymol. — Finally tables 18 and 19 contain data for 

 thymol. Like toluidine, § 19, thymol admits of considerable 

 undercooling ; and the isopiestics show circumflexure in that 

 region. Supposing all conditions to hold, no volume changes 

 would ensue on cooling under 1200 atm. 



