I02 
loss of water, into the asymmetric a, a-dimethylacetonyl acetone which 
Tiemann and Semmler had already obtained in the degradation of 
^-tanacetogene dicarbonic acid. These results can only be explained 
if methyl heptenone possesses the constitutional formula which Tie- 
mann and Semmler assigned to it: 
(CH3), C:CH . CHg. CH^. CO • CH3 
(CH3), C(OH) . CH(OH) . CH2 . CH2 . CO . CH3 
Glycol 
(CH3), C(OH) . CO . CHg . CHg . CO • CH3 (CHgj.CH . CO • CH^ . CH^ . CO • CH3 
Hydroxyketone Asymm. a, a-dimethylacetonyl acetone 
Citral. The value of this article depends upon that of lemon- 
grass oil. In view of the upw^ard tendency of the latter, a reduction 
in the prices was out of the question. 
We would call attention to the fact that our citral, as distinguished 
from many other commercial products, is specially pure, and has a 
specific gravity of 0,895. It differs in no way from the citral of lemon 
oil, which in the perfectly pure state has exactly the same character. 
The so-called terpeneless lemon oil, however, has a different aroma; 
this oil no doubt consists chiefly of lemon oil citral, but also contains 
other bodies, viz., citronellal, linalol, linalyl acetate, geraniol, geranyl 
acetate, octyl and nonyl aldehydes, methyl heptenone, and terpineol. 
Coumarin. After the price of this article had been forced down 
in an unheard-of manner by the competition, several manufacturers have 
combined to prevent a further drop, and they have succeeded in 
arresting the fall in the prices. The quotations will now no longer show 
the large differences of previous times. 
There are pronounced differences in the qualities of the products 
met with in commerce, differences which are due to the degree of 
perfection of the technical installations. Our plant, which on our removal 
to Miltitz has been completely re-arranged and improved, will now soon 
be in full operation. 
Eucalyptol (cineol). We would here once more point out, that a 
pure eucalyptol must be optically inactive; rotatory power always points 
to contamination. Our product melts at — i °. 
The uses of eucalyptol have in the course of time been greatly 
extended, and that not only for medicinal purposes, but also on account 
of its excellent qualities as an article of toilet, for the care of the 
teeth, and as a disinfectant of the cavity of the mouth. 
