— 53 — 
quantities. This is, for instance, the case in the neighbourhood of 
San Remo, on the slopes of the valley leading to Ceriana, at the foot 
of Monte Bignone. It is surprising that no portable still has yet been 
put up there, but that, on the contrary, this source of supply is left 
absolutely unused. 
Neroli Oil. In our last Report we published an examination 
of neroli oil made in our laboratory, in which we communicated the 
presence in this oil (not yet demonstrated by anyone else) of pinene, 
camphene, dipentene, terpineol, phenyl acetic acid, benzoic acid, and 
decylic aldehyde, and also by means of linalyl phenyl urethane (dis- 
covered by us), once more detected linalol which was already known 
as a constituent of the oil. A few weeks afterwards a work on neroli 
oil by A. Hesse and O. ZeitscheP) was also published, in which 
they confirmed both the presence of camphene and terpineol, and also 
that of linalol, geraniol and linalyl acetate, bodies whose presence as 
constituents of this oil had first been communicated by Tiemann 
and Semmler^). 
Hesse and Zeitschel in their publication^) call our examination 
of neroli oil a ''preliminary communication", which was to be 
followed by a ''publication". We are bound to protest against this 
misleading and wholly unwarranted description of our publication. The 
facts rather are these, that through our earlier publication, Hesse and 
Zeitschel had been placed in the position that they could only con- 
firm a part of our results. A rectification of this matter has just ap- 
peared in the "Journal fiir practische Chemie"^). In the same work 
the supposition put forward by Hesse and Zeitschel, that the neroli 
oil examined by Tiemann and Semmler had been largely adulterated 
with petitgrain oil, and that consequently their work in this connection 
was of no importance for the knowledge of the compo'sition of neroli 
oil, was rejected as not substantiated. 
Indol, which had hitherto only been detected by P. Engels^) in 
neroli pomade, has now also been isolated by Hesse and Zeitschel 
from neroli oil, in which it is present in extremely small quantity. 
They further found traces of acetic and palmitic acids, and a sesqui- 
terpenic alcohol C^5H2gO (nerolidol) boiling at 276° to 277°. Judging 
from the low specific gravity of the latter (0,880 at 15°), it appears 
^) Report October 1902, 54. 
^) Journal fiir practische Chemie II. 66 (1902), 481. 
^) Berliner Berichte 26(1893), 2711. 
Journal fiir practische Chemie II. 66 (1902), 484. 
Vol. 67 (1903), 315. 
^) Berhner Berichte 32 (1899), 2612. — Journal fill- practische Chemie II. 
66 (1902), 504. 
