492 



C. B aras — Fluid Volume and its 



20. Dipkenylatnine. — Values for diphenylamine are given 

 in tables 12 and 13. The initial pressure is unfortunately zero. 

 This introduces a possible discrepancy, since the zero of the 

 gauge is not vouched for. 



Table 12. 



Compressibility of Diphenylamine, NH(C 6 H B ) S , referred to zero atm. 



Melting point, 54°; boiling point, cflO . 







Observed. 





Computed 

 v/FxlO 3 









l, e 



P 



%10 8 



1.x 10 3 



/?xl0 6 



Diff. x 10 8 



i9x 10 6 



#0 xlO 6 









V 



y 













16'2 cm 



o-o 



00 





o-o 



- -o 







05° 



100 



65 



6-0 



63 



6-3 



- -o 



65 



65 





200 



11-9 



11-9 



60 



12-2 



- -2 









300 



179 



173 



59 



17-9 



— -3 









400 



23-2 



22-5 



57 



23'5 



- -7 









500 



29-2 



28-4 



o-o 



57 



28-4 



o-o 



+ '9 







16-4 cm 







o-o 







•0 







100° 



100 



6-1 



6 3 



62 



6-7 



— 5 



69 



69 





200 



12-8 



13*1 



64 



13'1 



- -2 









300 



19-3 



19-3 



64 



19-0 



+ '3 









400 



246 



25-1 



62 



24-7 



+ -1 









500 

 ' 



29-9 

 00 



305 



o-o 



60 



30-1 



o-o 



+ -1 







] 'J-^cm 



__. 



+ -o 



110 



110 



185° 



100 



11-2 



10-7 



110 



104 



+ -6 









200 



20-6 



20-3 



102 



20-0 



+ -5 









300 



29-2 



28-9 



97 



28-9 



— -1 









400 



37*1 



361 



91 



370 



- -4 









500 



44-1 



44-3 



89 



u-i 



- -5 







19.7cm 







o-o 



00 





•0 



•0 







(20-3 cm ) 



100 



18'5 



17-8 



202 



19-0 



-1-2 



213 



213 



310° 



200 



36-1 



36-1 



190 



360 



+ -1 









300 



51-5 



50-7 



176 



50-3 



+ -7 









400 



62-4 



635 



161 



63-1 



— 1 









500 



14.-1 



71-1 



152 



74*6 











Table 13. 



v 

 Thermal expansion of Diphenylamine, x 10 3 , referred to 65°. 



Atm. = 









100 



200 



300 



400 



500 



0= 



65° 



o-o 



o-o 



o-o 



00 



00 



o-o 





100 



12-4 



124 



113 



10-1 



10-1. 



41-0 





185 



93 



88-0 



83-1 



800 



780 



760 





310 



235- 



221- 



205- 



193- 



186- 



178* 



21. Caprinic acid. — Tables 14 and 15 finally give the results 

 for caprinic acid. Thermal expansion is irregular, possibly 

 due to motion of the thread in the tube, so that virtually two 

 threads were observed. The substance has a low melting 

 point, 30°, and is easily under-cooled to 25°. It then solidifies 

 under 300 atm. 



