12 1 
subtilis, was in no way impaired after 48 hours' action of a 
0,8 per cent solution of the substance. 
The acetyl compound also exerts does not act haemachrome 
and red blood corpuscles. 
Methyl ester of methyl anthranilic acid. 
Methyl ester of methyl anthranilic acid: 
to some extent reminds of the odour of oranges. This ester, whose 
melting point lies between 18,5° and 19,5^, occurs regularly in oil 
of mandarins, and also (as has recently been determined in the labor- 
atory of Messrs. Schimmel & Co.) in oil of rue. In water it is only 
sparingly soluble, but in alcohol and ether it dissolves in every pro- 
portion. Its solutions also show a magnificent blue fluorescence. As 
it possesses basic properties, it forms salts with acids. The preparation 
placed at my disposal was the sulphate of methyl ester of methyl 
anthranilic acid. It is readily soluble in water, but is then for the 
greater part decomposed into free sulphuric acid and methyl ester of 
methyl anthranilic acid. For this reason the essential oil floats on 
the fluorescent water which turns litmus paper red. After adding soda 
liquor, the sulphuric acid combined with the dissolved ester salt is now 
also abstracted from the latter, and the oil which is then finely divided 
in the water, gives it a milky appearance. 
Solutions of gold, silver and platinum are reduced by the ester 
salt, but not copper solution. Potassium chromate and bichromate are 
only reduced in the acid solution of the salt. 
When potassium permanganate is added to an aqueous solution 
of sulphate, there appears at first a yellow-green hue, which almost 
immediately changes into deep blue-black. After a few minutes this 
colour also disappears, to make room for a delicate bright- red hue. 
This red solution has at first an intense dirty slaty-blue fluorescence, 
but after a few hours this appearance vanishes completely. While 
gradually manganese dioxide is precipitated and deposited at the 
bottom, the liquid acquires a reddish-brown shade. 
If a sulphate solution is selected which has been neutralised or 
rendered alkaline with soda, there occurs, after potassium permanga- 
nate is added, only a green hue, and after a few hours manganese 
dioxide is precipitated whilst the liquid acquires a dirty turbidity. 
With potassium ferricyanide and ferric chloride, the sulphate (and 
consequently methyl ester of methyl anthranilic acid) forms a blue 
