12 Dr, S. Young on the Boiling-Points 



Table Y. {continued). 

 Esters, Variable Radical Normal, Iso-group in Fixed Radical. 



K, 



A. 



T°abs. 



Obs. I Calc. i Diff. 



GIL— COOR. 





365S 

 383-1 

 406-9 



17S 



23-8 



o 



27-3 



4- 0-5 

 25-9 I + 2-1 



GIL— COOR. 



CX".'-J07 : 3 \ f' 6 6 

 Or, ...1428-9 ! ~ 10 



25-4 

 24'1 



+ 7-8 

 4- 2-5 



K— COOC3IL. 



H . 



S 3G1°6 I 18 ' 6 I 29 '® 5 \ + 10 ' 65 



R. I T°al 



Obs. Calc. Diff. 



R- 



H \ 870-0 



CH a ...1 889-3 

 C..H, ..J 409-8 

 CX ...429-9 



COOC 4 H 9 . 



o 



18-4 



20-5 

 20-1 



1 





26 



cS'cV 



25 



4 



23 



9 



+8-45 



-{-4-0 

 +3-8 



E— COOC.H, 



H 



896-3 , 



GH., ... 



412-0 ■ 



C 2 H 3 ... 



433-2 



C 3 H 7 ... 



45i-6 ; 



C 4 H (J ... 



470-0 



C 5 H U ... 



487-0 



C 6 H 13 ... 



508-0 



7 H 15 ... 



526-0 



C 8 H 1T ... 



538-0 



15-7 



24-95 



+9-25 



21-2 



23-8 



+2-0 



18-4 



22-35 



+3-95 



18-4 



21-15 



+2-75 



170 



! 201 



4-3-1 



21-0 



| 19-2 



-1-8 



18-0 



1 18-15 



+015 



120 



; 17'8 



+5-8 



When there is an iso-group in the variable radical the 

 observed values of A appear to agree more closely with the 

 calculated, whether the fixed radical is normal or contains an 

 iso-group*; the comparatively small number of esters 

 belonging to this class are therefore given separately in 

 Table VI. 



The number of esters that have been examined is so large 

 that the data may be studied in greater detail than is possible 

 in other cases, and in Table VII. (p. 14) the esters are divided 

 into two classes, depending on the constitution of the variable 

 radical, whether normal or containing an iso-group ; each 

 class is divided into the two groups of lower and higher 

 members, the latter all containing one or more C — CH 2 — C 

 groups; and each group is arranged in the order of the 

 molecular formulae, so as to illustrate the influence of mole- 

 cular weight on the values of A. 



Although there are many irregularities in the table, it is 

 quite clear (1) that the differences between the calculated 

 and observed values of A are much greater for the lower 

 members of each homologous series than for those which 



* See footnote § on p. 9. 



