PRODUCTS FROM PITTOSPORUM UNDULATUM. 459 
had acted most strongly, but no appearance of anything like a 
yield of oil was obtained, hence it was decided to abandon the 
pursuit of this oil for the time being. 
An alcoholic extract of the husks from which the pitchy matter 
had been removed was prepared. This yielded an abundance of 
the green resin already referred to. It is clear therefore that 
both the characteristic resin and essential oil came from the peri- 
carp and not from the seeds. : 
In order to obtain the essential oil of the pericarp some three 
_ kilograms of husks were prepared. These husks were placed ina 
copper still with about their own volume of water, and then 
distilled by means of a current of steam led in to the apparatus, 
the still itself being kept hot by means of a moderate flame. An 
abundant yield of oil was the result. 
As it was now clear that nothing was to be gained by separating 
the pericarp from the seeds, I proceeded to submit the whole 
fruit to steam distillation in quantities of five to seven kilograms 
atatime. The greater part of the oil came over in the portions 
of water first collected. As the process went on, the yield soon 
grew to be so small as to be unremunerative, partly owing to the 
slight solubility of the oil in water. The yield is about 180 ce. of 
oil from 50 kilograms of fruit, which was the quantity operated 
Upon by me. It takes about two and a half hours to extract the 
oil from each lot of fruit, starting with boiling water and passing 
steam at a pressure of three or four pounds per square inch > 
through a half inch pipe into the still. 
The oil obtained by distillation has at first a rather acrid odour, 
but this is possibly due to traces of the accompanying water, for 
on drying by means of fused calcium chloride the odour quickly 
improves, and in a few days becomes almost the same as that of 
the bruised fruit. 
On submitting the dried oil to fractionation the following results 
Were obtained. The oil began to boil at about 174° C., and 
60—65 ce. were treated. 
