RUTACER. 959 
y Dyson Perrins. (Trans. Chem. Soc., 1862.) The bark also 
mtains a volatile oil and resins. Dr, Stenhouse has obtained 
om the carpels of Z alatum by distillation an essential oil to 
which the aromatic properties are chiefly due. This oil, which 
hen pare is called by Dr. Stenhouse Zanthoxylene, is a hydro- 
earbon isomeric with oil of turpentine. It is colourless, refracts — 
light strongly, and has au agreeable aromatic odour ; sinilee to 
that of Kucalyptus oil; its composition is C!° He, He also 
obtained a stearopten, Zanthoxylin, floating on the water distilled 
‘om the carpels and separable from the crude essential oil. 
After repeated crystallizations from alcohol, zanthoxylin may be 
obtained in a state of purity, and then presents the form of large! 
crystals of a fine silky lustre, insoluble in water, but ene 4 
a 
<> 
“sal 80° C., and its solidifying point 78° C. 
tion is C*° H® O%. The essential oil was obtained by 
edler and Warden (1888) by distilling the crushed carpels 
with seeds, in a current of steam. ‘'he oil was dehydrated by 
d Ca Cl?. It commenced to boil at 175°—176° C., the | 
reater part passing over between 176°—179° C., the » tempera- 
re then rose to 181°C. and rapidly to 183° C., ‘when the 
tillation was stopped. The rectified oil had a spevilic — 
“gravity of -873 at 15-5 C. Its vapour density determined — 
by Meyer’s method was 5°43. . They were unable to obtain the 
erystallizable stearopten isolated by Stenhouse. 
distilled oil exposed to 0° C. failed to deposit any crystals. 
of a pale yellow viscid non-drying oil, an acid resin, and. 
er acid — forming deep yellow solutions with valka- 
; but the fruit of E. feeip does ‘not 
