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lemon oil. But whereas here the detection of such adulteration is 
mostly, very difficult, in bay oil these additions are readily detected, 
as they cause a pronounced alteration in the specific gravity and the 
phenol-content. 
All the oils mentioned above had, however, also been adulterated 
with petroleum, which was discovered on the closer examination of 
the portions of the oil which had not been absorbed by soda liquor. 
By suitable, repeated treatment of these portions with concentrated 
sulphuric acid, and subsequent steam distillation, a bright yellow oil 
was finally obtained, which was proved to be petroleum, both by the 
odour and taste, as also by its other physical constants. This last- 
named adulteration consisted of perhaps about 5 per cent of the oil. 
The facts here described give another striking proof of the unprece- 
dented audacity with which the adulteration of essential oils is carried on. 
Cajeput Oil. A consignment imported by us direct from 
Macassar per s. s. „ Bielefeld" comes slightly more advantageous than 
a previous shipment, but the heavy expenses, added to the unavoidable 
loss through breakage, leave but seldom a profit on Cajeput oil. 
The consumption of this remedy against toothache (which antidote 
at one time was so much in demand), is constantly declining. 
Calamus Oil. We have already on a previous occasion^) 
reported on some constituents of calamus oil, which Thoms and 
Beckstroem had detected in it. Beckstroem has investigated this 
matter further, and has published the results thereby obtained in a 
thesis 2). The body of the melting point 168° discovered in calamus 
oil, which has hitherto been called calamus camphor, has now been 
named „calameone" by the author, since he found in the course of 
his examination that this body is neither an alcohol nor a ketone, but, 
in view of its constitution, can be compared with cineol. Calameone 
is oxidised by permanganate of potassium, at ordinary temperature, 
into a monobasic acid H24O4 -|- O, calameonic acid, containing 
one molecule water of crystallisation, and melting at 153"^. When 
heated to its melting point, this acid becomes anhydrous, and then 
melts at 138°. When calameone is treated with bromine, compounds 
are formed which have the formulae QgHg^Br, C^^HgoBrg, and 
C^gH^gBr^. With hydrochloric acid, calameone yields a product of 
addition melting at 1 1 9 °. As already mentioned in our last Report 
a hydrocarbon C15H22 is formed when calameone is heated with a 
^) Report October 1901, 10. Report April 1902, 9. 
^) R. Beckstroem, Ueber die Bestandtheile des Calmus - Oeles. Thesis, 
Berlin, 1902. 
^) loc. cit. 
