PRODUCTS FROM PITTOSPORUM UNDULATUM., 457 
epidermis is easily bruised by the fingers, and when this is done 
a strong scent peculiar to the fruit at once becomes noticeable. 
This odour resembles that of the rind of the tangerine orange, but 
is easily distinguished from the latter. During May 1894, I was 
struck with the great abundance of the fruit of Pittosporum 
undulatum, and determined to examine it in so far as my quite 
inadequate knowledge and opportunity permitted. 
On cutting sections of the outer rind and examining them under 
the microscope, I expected to see globules of oil, but in this I was 
disappointed, either from incompetence as an observer or for 
some real reason which I do not understand, for subsequent 
observation showed that oil exists in abundance in this part of 
the fruit. Sections of the seeds showed a few globules of greenish 
oil, but not many. 
I then compressed the ripe fruit in a screw filter-press, and 
from 500 grms. of fruit I obtained 70 cc. of a thick juice which 
was brownish-yellow in colour, smelt strongly of the oil and 
rapidly thickened on exposure to the air—or rather the surface 
did so. 
On extracting this juice with alcohol and evaporating on the 
water bath, I obtained a fine green solution which had solidified by 
the next day to a hard green resin. This resin has a most pleasant 
smell, which so far as I know is quite peculiar to it, and which 
appears when the resin is heated—in the cold it is without any 
odour. During the evaporation of the alcohol the smell charac- 
teristic of the fruit was strongly marked, but it disappeared 
towards the close of the operation, whence I inferred that the 
odour of the fruit is probably due to the presence of an essential oil. 
The juice also yields a watery extract, which when filtered and 
dried gives a brown mass. This brown substance has the bitter 
‘romatic taste of the fruit. It was perfectly soluble in water and 
8ve a blue-black precipitate with ferrous sulphate. 
Tt was noticed that the seeds were not in any way crushed by 
adi filter-press, and after several attempts it was decided = 
Separate the seeds from the fruit, and to treat each part separately. 
