494 



C. Barus — Fluid Volume and its 



Table 16. 

 Compressibility of Paraffine referred to 20 atm. Melting point 55°. 





V 



Observed. 



/?xl0 6 



Comput'd 

 -xlO 3 



Diff. x 10 3 



#xl0 6 





l, e 



lx 10 3 



1 x 10 3 



* xl0« 







V 



V 





V 









64° 



20 



o-o 



o-o 





o-o 



-■o 



88. 



89 



15-86 cm 



100 



6-8 



6-5 



83 



6-8 



-•1 









200 



14-9 



14-9 



83 



14-8 



+ •1 









300 



23-6 



23 8 



84 















400 



solidify'g 



(56-6) 



(149) 















100° 



20 



o-o 



00 





00 



—•o 







16-28 cm 



100 



8-5 



8-5 



106 



8-5 



•o 



Ill 



114 





200 



18-5 



18-7 



103 



18-5 



+ 1 









300 



27.6 



27-7 



99 



27-4 



+ •2 









400 



35.6 



35-8 



94 



35-8 



— •1 







185° 



20 



o-o 



o-o 



* - - - 



o-o 



•o 







17'57 cm 



100 



13-8 



13-8 



172 



133 



+ '5 



178 



184 





200 



27-9 



28-2 



156 



28-1 



•o 









300 



41-2 



414 



147 



411 



+ '2 









400 



52-3 



52-0 



o-o 



137 



52-7 



o-o 



— •5 







310° 



20 



o-o 



•o 







19-70 cm 



100 



26-8 



26-2 



331 



260 



+ •5 



366 



392 





200 



51-9 



52-1 



289 



51-7 



+ •3 









300 



72-4 



71-8 



257 



72-7 



-•6 









400 



89-9 



89-6 



236 



90-3 



— •6 







Table 17. 



Thermal expansion of paraffine, .x 10 3 referred to 64 c 



Atm.= 





20 



100 



200 



300 



400 



6= 



64 c 



o-o 



o-o 



o-o 



o-o 



o-o 





100 



26-4 



24-1 



231 



22-6 



22-1 





185 



1080 



100-0 



92-9 



87-8 



83-8 





310 



241-0 



210-0 



196-5 



181-0 



167-0 



24. Similar data are in hand for benzoic acid, monobrom 

 camphor, a-naphtol, azo-benzol, vanilline, naphthaline, and 

 monochloracetic acid But as the data are less complete and 

 add no new features to the discussion, I omit them here. 



To illustrate the general character of the results I have con- 

 structed the data for para-toluidine graphically in figures 2 

 and 3. The former shows the relative isothermal volume de- 

 crements the latter the relative isopiestic volume increments. 

 The undercooled region is marked by a. 



