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rectification in vacuo. avi she ise 
As to adulterations, we would here mention an oi ‘received from Gein lt : 
showed normal specific gravity and rotation (diso 0.8600; Gyno + 609), but the residue 
after evaporation was of a most suspicious nature. Quite apart. from the fact that it. e 
was far too high (6.6 per cent.), it was not waxy like that of the genuine oil, but viscous : “ 
and of an almost pure oily taste. It was to be deduced from this hey that ae oil was. : : 
either grossly adulterated or an artificial product. — 3 sae 
Another artificial oil of lemon, originating from a small Leipzig firm, showed that _ 
the “art” had carried off the “artist”. The only resemblance with lemon oil was its ae 
content of 5 per cent. citral, whereas the other properties were so absolutely different 
that it could in no way claim the name of “artificial lemon oil”. The better half 
consisted of a resinous substance, the remainder of bodies boiling in the main between 
220 and 260°. Terpenes showing the boiling point of limonene were not to be found 
in it. The strange composition expressed itself in the constants, especially in tHe. ‘ A 
lzvorotation and the high residue after evaporation: diso 0.9613, Gy — 14°28’, residue 
after evaporation 58.4 per cent. Finally, we may say that the smell was nothing less 
than exquisite. 3 
As per an official Italian communication, the stocks of oil of turpentine seem to is 
be rather low in Italy, and as there are not enough buyers for lemon oil, in consequence - 
of the reduced possibilities of export, the Government has taken steps in oder to decree 
the use of lemon oil instead of-turpentine oil. 
The Italian Ministry of Industry, Trade and Labour proclaims in the “Gazzetta 
Ufficiale”, No. 166, that the top price for lemon oil, meant as a solvent for varnish - 
and enamel (2) for purposes of the State, has been fixed at Lire 8.50 per kg.’ The oil | 
must have the following properties: 1. Pale colour and characteristic pure smell. — 
2. Specific gravity of 0.854 to 0.861 at 15°, at least 80 per cent. to distil over between | 
173 and 180°, the remainder up to 220°. 3. No more than 5 percent. residue after’ ~ 
evaporation on a water bath. 4. Purity and freshness to an extent that the oil may be 
considered appropriate for varnishes. 
In an American periodical, there i$ a notice by-F. Mc. Dermott’) on storing lemon 
oil. He points out that, as it is known, it easily deteriorates, even if kept in brown 
bottles, when in contact with the air, losing its fresh smell of lemons and taking a 
turpentine odour. In order to prevent this, it has been recommended to add 2 per cent. . 
of olive oil or a certain proportion of alcohol and to store the oil in an carbonic acid 
atmosphere. Mc. Dermott is in favour of adding 10 per cent. of alcohol, as such a lemon ~ 
oil keeps its odour unchanged for months. He therefore proposes to prescribe in the Le oe 
pharmacopeceia the addition of 10 per cent. alcohol. 
Oil of Orange. Our April Report 1915 contains, on page 22, some notes on the 
production and the properties of Jamaica orange oil, so that we need only say a few > 
words here about an article recently published in an English periodical?) on the same 
subject. It is stated there that about 1200 fruits will produce 21/2 Ibs. of oil and that 
the adulteration with petroleum and cotton oil, formerly Prachoee to a “great yas = 
1) Americ. Perfumer; Pharm. Weekblad 54 (1917), 721. — According to Apotheker-Ztg. 32 (1917), 379, 
2) Perfum, Record 9 (1918), 57. — Americ. Journ: Pharm. 91 (1918), 187. bp ea 
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