— 41 — 
phthalic acid anhydride, we obtained a few drops of an alcohol which 
had a very pleasant odour like roses. With the small quantity at 
disposal, a phenyl urethane could not be obtained. On further examin- 
ation it may possibly be found to be a terpene alcohol (geraniol, 
citronellol). 
Esters. The saponification number of the original oil already 
shows that the oil contains small quantities of esters. Especially the 
fractions boiling above 95° (3 to 4 mm pressure) were fairly rich in 
esters. We determined the saponification number of an oil of the melting 
point 96° to 98° (4 mm pressure) obtained by repeated fractionating, at 
191,0, corresponding to an ester-content of 66,85^/0 H^^ O C O C H3. 
Saponification with alcoholic potash yielded d-terpineol of the melting 
point 35°. Specific gravity of the compound purified from alcohol : 0,938; 
optical rotation: at 22° -|- 18° 16' (50mm). The terpinyl phenyl ure- 
thane melted at 112°. Of acids, we isolated from the individual ester- 
fractions, acetic acid and valeric acid. Nothing definite can as 
yet be said with regard to the proportion of these two acids in the 
detected alcohols, as, for the purpose of more convenient working up, 
we combined and fractionated small quantities of the individual acids. 
But it is very probable, judging at least from the pungent odour of 
the acid, that terpineol is present in cypress oil as acetic acid ester. 
The principal fraction of the mixture of acids boiling at 115° to 140*^, 
could be recognised by its odour as acetic acid. This was also proved 
by the analysis of the silver salt, which, however, no doubt contained 
an admixture of small quantities of silver valerianate : 
0,2374 g of the substance yielded 0,1501 g Ag 
0,2016 g „ „ „ „ 0,1273 g „ 
Found: Calculated for CgHgAgOg: 
63,230/, 64,670/, 
I I. 63,230/, 
^[2. 63,190/, 
The second acid, distilling between 140° and 210^, could be 
identified by the odour and the analysis of the recrystallised silver 
salt, as valeric acid: 
0,2408 g of the substance yielded 0,1237 g Ag 
Found : Calculated for C5 Ag Og : 
Ag 5i.377o 51,670/, 
A third acid, boiling at 210^ at 260^, was obtained in the form 
of long, silky needles melting at 129°. 
No free terpineol was found in cypress oil. We are at present 
still occupied with the portions of the oil passing over above 114^ 
(3 to 4 mm pressure), in which the cypress camphor must be looked 
for. It follows from the above examination, that cypress oil contains 
about 65 0/, terpenes, of which the bulk consists of camphene and 
