exxiv Proceedings of the Asiatic Soc. of Bengal. [N.S., XVII, 
Experiments have also been made in order to determine whether the 
free weds present in most crude vegetable oils are able to replace the 
accelerator—acetic acid or manganous sulphate—usually nece ssary when 
acid free oils are hydrolysed with crushed castor seeds or Nicloux’ ferment. 
Studies on the dependence of optical rotatorv power on che- 
oe constitution Part III :—p-naphthalene-bisimino- 
amphor—an instance of an optically active substance 
Sea the highest rotatory power.— By B. K. Stneu. 
This i Page ery deals with the hi acteleeae bape rotatory power 
determination of | : 4-naphthalene-bisimino-camphor, which is endowed 
with a far higher rotatory pore an any pe te hitherto known, as 
shown in the following table 
i | | 
[Mp]o In chloroform | sae | sas Pyridine. 
tas 
|: 4-naphthalene- | | 
bisimino-cam- | 
phor ead 8175° | 9052° 12071° | = 13416° 
p-phenylene - bisi- / 
mino - camphor 
(the highest 
hitherto known) 6096 5009 5289 6173 
Difference... 2079 =| 4043 6782 7248 
Researches on porphyroxine.--By Jrrenpra Nata 
. Raxksuir. 
The methoxy group in porphyroxine has been determined, and its 
cetiseaits and salts of its acetyl derivative have been prepared. 
Estimation of ees fulminate in detonator composi- 
ion «a. DES 
|. The Cefects of the existing methods are pointed out, 
2. An improved method of estimation is described. 
Preparation of 8-3: 4-dinitrodimethyl-aniline—By P. S. 
VARMA. 
ay reg ator mee -aniline was prepared by awepe! a c.8 
1920, it. 1-4) b rating m- -nitrodimethyl-aniline in ce Ta- 
tions of palpate: acid and using the requisite quantity of niseis acid of 
i ncentrati = results the 8-modification ° 
here 
3 : 6-dinitrodimethy]- aniline first obtained by Romburgh (Rec. trav. chem. 
1887, 6, 250). 
The of prepaeag. a &-modification of the 3 : 4-dinitro- 
dimethyl sie consis e sulphuric acid product of di- 
methyl-aniline with ers pote at a tempe 0°C. If the 
temperature is not wed to rise, a ail yield of the product is 
not all 
obtained, oubiersiine the yield is very poor 
