COMMERCIAL AND SCIENTIFIC NOTES ON ESSENTIAL OILS. 39 
_ and further we were enabled to observe this time also, that acid value II did not 
allow itself to be sharply estimated. Unfortunately only very small samples were at 
our disposal, and again it was impossible to exactly identify the acid in question. 
Whilst with oil I one had been satisfied in adding one adulterant, and had done 
it with so much foresight that it was only recognizable on closer examination, it was 
too high specific gravity, and then by the quite impossible ester value, which would 
just the contrary for oil Il. Here the adulteration was at once betrayed by the far 
correspond to a content of 86.9 per cent. of linalyl acetate. The oil had been mani- 
pulated, as was shown in the course of further analysis, in a manner quite unheard of, 
for besides the conjectured ester of lauric acid, glycerin acetate and the ester of 
phthalic acid were proved to be present. 
_ The last-named adulterant occurred in a further lavender oil that we also had to 
pass an opinion on. This was not the only adulterant present but it amounted to about 
- 50 per cent. This was naturally shown strongly in the specific gravity and in the ester 
value:— djs0 1.0226, acid value 0.9, ester value 323.2. This last would correspond to 
a content of linalyl acetate of 113 per cent., whilst in reality only 14 per cent. was 
present, as was seen from acid value II (39.2). ae 
Lime Oil.— After the conclusion of the War further advances in the lime industry 
are to be noted in the Leeward Islands and in British Guiana, on the satisfactory 
development of which we have already reported’). Not only on Dominica, St. Lucia 
and Trinidad, but also on Antigua, Nevis and Tobago successful efforts are being made, 
‘to improve the processes for winning the oil, and to protect the lime plantations against 
diseases and insect damage by careful culture. Hence the plant raisers were requested 
to spray the young lime trees regularly on account of insects, to protect then with wind 
_ screens, and if necessary to drain the land. The Government Lime Factory at Onder- 
_ neeming (British Guiana) yielded in the period from April 1st 1917 to Gee 31th 1918 
a net profit of 160 per cent. on the invested capital a) 
- Linaloe Oil.—Various large lots of Mexican oil have arrived, but on account of 
the low value of the mark, the prices keep about the same as last year. 
The imports of Cayenne oil (Bois de rose femelle) were very small, and only recently 
have the offers increased, but still.at unchanged high prices. 
The amounts exported from French Guiana are as follows?):— 
. 1890 to 1899 1384 kilos 1914. . . 39569 kilos 
1900 , 1909 5369 ,, AOS) ye 2h GOR 
WA ac OFLA. tOIGY 57 9) SBA 10% < 
We ess AZGAZ 8 1ONB Ey, EE SOA 
1912 rk S 35936° 3 AONB ys AD 270.8 
1913... . 44676 , AOI OY ABO aac 
From these figures the significant set-back in the production is noticeable. 
Oil of a Mentha species.—F. Elze*) gives some data re the essential oil of a 
Mentha species growing in large quantities in the stubble-fields of Central and Northern 
_ France, which is probably a hybrid of Mentha piperita, L. and M. Pulegium, L. By steam 
J 1) Cf. Report 1919, 34. — 7) Perfum. Record 10 (1919), 187. — 3) Chemist and Druggist 98 (1920), 944. 
_— 4) Chem. Ztg. 48 (1919), 740. 
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