274 J. Maier on detecting the adulteration of essential Oils, 
I made the same researches with pure oil of juniper, which I 
had prepared myself, arrived at the following results: 
experiment had a specific gravi 
0-858 and showed a deviation of —5°-970. The oil of turpen- 
tine employed was the same as in the above mentioned experi- 
men mixture of equal volumes of oil of juniper and oil of 
turpentine showed a deviation of —40°-84; the calculation gives 
a deviation of —39°'553 as follows: 
4 vol. oil of juniper m— 2°985 
4 vol. oil of turpentine = — 36°-568 
1 vol. mixture = —39°553 
From this it is proved that the quantity of the adulterating 
oil of turpentine can be detected through the medium of the 
saccharimeter. But if the essential oil is adulterated not a 
with oil of turpentine but also with another optically active 0 
the saccharimeter test is of no value. In order to fin it the 
Oil of —— [ oc] =—42°:275. 
Oil of le | oc] =-+80°5738. 
Oil of } fakin: [ c|=— 3°-479. 
The quantity of oil of cin coy employed for the adulters- 
tion, is calculated as follow 
a the power of rotation of the pure oil. 
Be oil of one 
“ “ “ “ “ 66 mix xtur 
oe eS quantity “6 
dee spite adciener oil of turpentine. 
The quantity of the pure oil as contained in the bao 
=m—a, and the power of rotation of this quantity 18 is er ae : 
the power of rotation of the oil of turpentine = aye 
stl of rotation of the whole quantity of miei 
ence results the following equation: 
(m—a)a—bx-=me 
ma—ax—bx=me 
