— 68 — 
Second qualities can now as before be had in abundance, but owing 
to the excellent artificial oil which we supply, the demand for them 
is constantly decreasing. 
Ylang Ylang "Schimmel & Co/' A German patent No. 142 858 
has been granted to us for our discovery of various important constituents 
in ylang ylang oil. We intend shortly to avail ourselves of the rights 
which we have thereby obtained. 
We think it superfluous to say anything further on the quality of 
our product. It is beyond all praise. 
Supplement to the Dutch Pharmacopoeia. 
Belgian Pharmacopoeia. 
On the occasion of a discussion^) of the essential oils included in 
the Swedish Pharmacopoeia, it was pointed out that here, as in the last 
edition of the German Pharmacopoeia, the directions for testing have 
been greatly improved and brought up to date, in accordance with the 
progress made during the last few years in the examination of essential oils. 
The same appHes to the above-named pharmacopoeias, viz., the 
Supplement to the Dutch Pharmacopoeia published by the Dutch 
Association of Chemists 2), and the new Belgian Pharmacopoeia 
now in preparation; especially in the case of the last-named, the 
advance, as compared with the Pharmacopoeia at present in use, is 
very considerable. In spite of this, an improvement, or correction 
(as the case may be), of several prescribed tests is advisable; the various 
corrections suggested will be discussed in the following pages, taking in 
each case the requirements as specified by the Pharmacopoeias. With 
regard to the strengths of alcohol, we would mention that the Dutch 
Pharmacopoeia gives aSpiritusfortiorof 89 to 91 per cent, by volume, 
and a Spiritus dilutus of 69 to 71 percent, by volume, whilst the 
Belgian Pharmacopoeia has only one Alcohol, of 92 percent, by volume. 
Supplement to the Dutch Pharmacopoeia. 
Oil of Amber, purified (6^/. Succini depuratum). Colourless or light 
yellow; A^^o = 0,86 to 0,89^); soluble in 10 to 12 parts Spiritus fortior. 
^) The specific gravity of our oil rectified by ourselves, of which we fully 
guarantee the purity, is decidedly higher, and fluctuates between 0,925 and 0,930. 
The lighter oils are usually adulterated. 
1) Report April 1902, 68. 
^) In Holland no new edition of the Pharmacopoeia has been published since 
1889, and for this reason the Chemists' Association of that country has now issued 
the above-mentioned Supplement. 
