oe REPORT OF SCHIMMEL & Co. OCTOBER 1915. 
comparison purposes a sample of palmarosa oil was used, such oils being, as is well — 
known, often resorted to for adulteration. of rose oil. It was also clear and of yello- 
wish colour. 
The rose oil had the following constants: ‘dees 0.8565; acid v. 2.93;) ester-v) 2065 
iodine value 169.06 and the. palmarosa oil: do10 0.8925; acid v. 1.13; estersys=iterae 
iodine value 215.01. ' 
As Siedler had reason to suppose that the composition of Bulgarian rose oil differs, 
according to the place of production and to the quantitative proportion of red and 
white rose petals used in its production, he refrained from drawing any conclusions 
from the above-mentioned figures. 
F. Dietze') now reverts to Siedler’s work, and as the values found confirm his own 
former observations, he gives Siedler’s results once again, along with the constants of 
the most generally used adulterant, and with his own figures laid down 18 years ago. 
devo rose oil Siedler 0.8545, Dietze 0.845 to 0.866; palmarosa oil Siedler 0.891. Cry- 
stallization-point rose oil Siedler 22°, Dietze not below 15°; sap. v. rose oil Siedler 
9.99, Dietze not above 10; palmarosa oil Siedler 20.04; ester v. rose oil Siedler 7.06, 
Dietze 6.5 to 8; palmarosa oil Siedler 17.71. Ratio (calculated on acid and ester values) 
rose oil Siedler 3.41; Dietze not above 7; palmarosa oil Siedler 15.7. 
J. Mendel”) writes on the economic importance of rose oil. He discusses chiefly 
the conditions of production, the industry and the distilleries. He reports in the form 
of tables on the crops in the various Bulgarian districts from 1891 to 1913, as well 
as on the export of rose oil and rose-water from Bulgaria. Our own rose production 
in Miltitz is also given a short paragraph. 
Rose Oil, French. R. M. Gattefossé’) reports on rose oils obtained in the South of 
France from cultivated roses. The “rose Brunner” (‘Ulrich Brunner rose’) furnishes 
an oil melting above 28°, the yield being 1 kilo from 18000 to 20000 kilos of blossoms. 
The oil from the roses “Louis van Houtte” and ‘Marie van Houtte” is distinctly green 
when freshly distilled, but it soon assumes the pale yellow colour of the Bulgarian 
oil; m. p. 16°; @,—11°; sap. v. 9.8. Furthermore mixtures of various well known 
species of roses had been distilled which yielded a product of good odour: d 0.864; 
ty — 2.2°: sap. Vv. 32; m,-p.-above 26°. 
The rose “Ulrich Brunner” seems to be particularly well suited for the predlicHed 
of rose-water, more especially so when mixed with ,,rose de mat” 
The “vose de mai” is generally. used in the South of France ae the manufacture 
of rose-water. The yield is bad: 10000 to 110000 kilos of roses furnish 1 kilo of oil 
and 10000 litres of rose-water. According to Gattefossé the cause is to be found in 
the fact that the roses are often exposed for hours to carriage by rail. They may only 
reach the factories towards noon, and it often happens that they cannot be distilled 
till next day. Moreover, the stills used in Grasse, which are supplied with a “swan’s 
neck”, are not suitable for the work. In La Colle the flower farmers have obtained 
results as satisfactory as in Bulgaria in their modernly equipped distillery. The stills 
hold from 1000 to 1500 kilos of flowers; neck and head are short and wide. 
We may here add that the above-mentioned low yields are explained by the fact 
that in the South of France the roses are mainly worked for rose-water, the oil being 
1) Siidd. Apotheker Ztg. 1915, 57; Pharm. Ztg. 60 (1915), 331. — 7) Deutsch. Parf. Ztg. 1 (1915), 54. — 
8) Perfum. Record 5 (1914), 316. 
