1124 
_ Nitration of o-dichlor-benzene. 
Pl) ==) 
| found, calc. | found 
calc. | 
a (1,2,4)| 94.8 | 94.8 | 92.8 | 93.0 | 
b (4; 2,3)| 5.2|°5.2| 7.2) 720 
Nitration of o-chlor-benzoic acid. 
| 
| 
found | calc. found, calc. 
ee 
| | 
| 
| 
a (1,2,5)| 86 | 86.4| 84 | 83.8 | 
b (1,2,3)/ 14 13.6 | 16 | 16.2 
| 
Nitration of o-brom-bengoic acid. 
— = 160 
found calc, found, calc. 
| a (1, 2,5)| 82.9 | 82.9 | 80.3 | 80.3 
| | 
| | 
BON TT PO. Te OST 
When we now pass in review the results of the above tables, 
it appears that the harmony between the found and the calculated 
values is very satisfactory in general. In the majority of the 
examples the deviations very certainly remain within the errors of 
observation. Only in the nitration of benzoie acid an appreciable 
deviation between the found values and the calculated ones occurs. 
This nitration, however, is according to Pref HOLLEMAN one of the 
first carried out examples, in which the “method of extraction” was 
applied, which was later replaced by more accurate analysis methods. 
