( 618 ) 
In this nitrated chloride the position of the nitrogroup is known, 
as it is also formed from o.-nitrotoluene. 
I have prepared the corresponding amides by acting with mono- 
methyl- and monoethylamine on this. 2. nitrotoluene. 4. sulpho- 
chloride. By treatment with nitric acid the methylamide gave the 
above mentioned nitroparatoluenesulphomethylnitramide melting at 
116° and the ethylamide gave the analogous ethyl compound melting 
at 76°. 
During the action of nitric acid on the alkylated amides of para- 
toluenesulphonic acid, the reactions in regard to the amido-group 
are analogous to those observed in the case of benzenesulphonic 
acid; a nitrogroup, however, readily enters the nucleus and occupies 
the ortho position in regard to the CH3. Consequently 2. nitro- 
toluene. 4. alkylnitramide sulphonates are also formed. 
An extensive communication on the numerous compounds obtained 
during this investigation will shortly appear elsewhere. I intend 
to state on a future occasion the results of the action of nitric acid 
on the two other isomers of toluenesulphonic acid. 
Chemistry. — Dr. P. van RoMmBureH: ‘On some further consti- 
tuents of the essential oil of Kaempferia Galanga L.” 
(Communicated by Prof. FRANCHIMONT). 
(Communicated in the meeting of February 22, 1902.) 
On May 26th 1900, I had the honour to present to the Academy 
a communication on the ethyl ester of p.-methoxycinnamic acid, the 
chief constituent of the essential oil of Kaempferia Galanga L. 
(Kentjoer, Mal.). Since then, I have continued the investigation of 
the liquid portion of that oil and tried in the first place to identify 
the nature of the second acid which I had found in it. Its purifi- 
cation, when contaminated with p.-methoxycinnamic acid, is not an 
easy matter and it must be recrystallised many times from water 
and alcohol before obtaining a product with a constant melting point 
(133°) which proved to be cinnamic acid. The acid may be more 
readily obtained pure by distilling the liquid essential oil in vacuum 
and saponifying the fraction boiling at 155°—165° (at 30 m.m.). 
The acid thus obtained at once showed the right melting point. 
The alcohol formed during the saponification of that fraction proved 
to be ethyl alcohol so that the Kentjoer oil consists to a large extent 
