— 54 — 
The neroli oils A, B, C, D and E are samples examined by me. ' 
The neroli oil A cannot be pure, but must contain oil of bitter 
orange (low specific gravity and saponification number, high rotatory 
power). 
The neroli oil B is pure; I have received it from a business 
friend at Grasse. It was distilled on 31^^ May. 
The neroli oil C I consider pure. 
The neroli oil D must contain neroli oil from the autumn distil- 
lation, for it is very dark (low saponification number, high rotatory 
power). 
For neroli oil E the same remark applies as for neroli oil A. 
All these oils, except sample B, had been distilled over an open fire; 
I believe that this causes a higher degree of solubility in alcohol, and 
a lower saponification number, the same as in the case of lavender oils. 
Distilled oil of bitter orange is largely used for adulterating neroli 
oil; it is distilled over blossoms, in the month of May." 
J. C. Umney and C. T. Bennett^) report on a Chinese neroli 
oil. The product examined by the authors is said to be derived 
from Citrus triptera [trifoliata) , a species of citrus which thrives 
luxuriantly in Southern Europe, and whose fruit resembles the man- 
darin. A remarkable fact is that this species has a large number 
of thorns. 
The yellowish-brown oil had a peculiar, sweet odour, showed a 
very faint blue fluorescence, and had the following constants: Specific 
gravity 0,850; optical rotation -j-35^. It boiled between 165 and 220^ 
and its ester-content amounted to 4,97 per cent (calculated as linalyF 
acetate); its total content of alcohol was 25,17 per cent (calculated 
as linalol). In the opinion of the authors the oil contains limonene, 
camphene, linalol, linalyl acetate, methyl anthranilate , and a paraffin 
hydrocarbon. The authors do not, however, state how these bodies 
were detected. 
Although the authors believe that this oil cannot bear comparison 
with French neroli oil, or with the imported petitgrain oils, it will 
yet be found suitable for use in perfumery and in the manufacture 
of soaps, on account of its very pleasant odour. 
In connection with our examination of petitgrain oil we have also 
occupied ourselves with neroli oil, and we wish to publish here the 
results obtained. 
The material worked up had been obtained from Roure Bertrand 
fils of Grasse, and had the following properties: Specific gravity 0,8772; 
^) Pliarm. Journal 69 (1902), 146. 
