502 



O. Barus — Fluid Volume and its 



within the range of accuracy specified in the critical para- 

 graphs 9 to 15. 



Table 23. 

 Isothermals of Ether, referred to unit of volume at 28° and 100 atm. 





*310° 



185° 



100° 



65° 



28° 



Isometrics. 



6= 



e 



Ap 



Volume. 



p=0 

 100 

 200 

 300 



~2~77 

 1-70 

 1-50 

 1-38 

 1-29 

 1-22 

 1-16 

 1-12 

 1-08 

 1-04 

 1-01 

 •93 

 •88 



1-397 

 1-298 

 1-236 

 1-193 

 1159 

 1-132 

 1-109 

 1-088 

 1-069 

 1-053 

 1039 

 1-001 

 •983 



1-131 



1-097 



1-071 



1-049 



1030 



1-014 



1-000 



•986 



•975 



•964 



•955 



•929 



914 



1-057 



1-035 



1-017 



1-001 



•987 



•974 



•963 



•953 



•944 



•935 



•927 



•904 



•893 



1-000 

 •984 

 •971 

 •959 

 •948 

 •938 

 •929 

 •921 

 •913 

 •906 

 •S99 

 •881 

 ■870 



28° 

 65 

 100 

 185 







310 



600 



1300 



1-00 



400 



500 



600 



700- 



800 



900 



1000 



1100 



1400 



1600 



Rate *12° per atmosphere. 



■ 

 1 



Table 24. 

 Isothermals of alcohol, referred to unit of volume at 28° and 150 atm. 





310° 



185° 



100° 



65° 



28° 



Isometrics. 



0= 





1 















6 



Ap 



Volume. 



p=0 













28° 







1-0 



150 



2-29 



1-229 



1-087 



1-035 



1-000 



65 



367 





250 



1-63 



1-193 



1-071 



1-024 



•991 



100 



740 





350 



1-47 



1-165 



1-057 



1-014 



•983 



185 



1470 





450 



1-37 



1-142 



1-044 



1-004 



•976 







550 



1-29 



1-122 



1-033 



•996 



•969 



Rate -10 



per atmosphere. 



650 



1-24 



1-105 



1-022 



•988 



•963 







750 



1-19 



1-089 



1-013 



•980 



•956 







850 



1-16 



1-075 



1 004 



•973 



•951 







950 



1-12 



1-063 



•995 



•966 



•945 







1050 



1-09 



1-051 



•988 



•960 



•940 i 







1150 



1-06 



1-041 



■980 



•954 



•935 







1450 



1-00 



1013 



•961 



•938 



•921 







1650 



•96 



0-997 



•949 



•928 



•912 







32. Isothermals computed. — From these results the actual 

 isothermals of the above substances can be constructed. To 



recapitulate : the volume decrement^/ V=ln(l+9&p) 1 ' 9 , refers 

 in all cases to unit of volume at the temperature of the isother- 

 mal and under the initial pressure p Q . The compressed 

 volume is therefore \—ln (l-f-9#i?) 1//9 ; and if in consequence 

 of the observed thermal expansion at p , the volume at be 

 Vq the actual isothermal is 



* Special measurement, made later. 



