836 



BOTAiNY AND PHARMACOGNOSY. 



crystals which are nearly insoluble in \\ater and at 15 C. one 

 part dissolves in 75 parts of alcohol and 30 parts of ether. It 

 is also soluble in chloroform and acetic acid.* The micro- 

 scopic crystals obtained from ProUius' solution vary in length 

 from 100 IX to 300 p. (Fig. 334). In among the crystals liquid 

 drops of amorphous material were observed, which later changed 

 to more or less distinct crystalline aggregates. 



Fig. 3J4. Cubebin: urthorhombic cr\slals fruiu t'rulliu^' bulutioii, t>hu\ving various 

 types of twinning (a, b, c); d, amorphous material in the form of oily drops (under-cooled 

 liquid); e, this amorphous material crystallizing in aggregates. 



Cubebin. Crystals obtained from ProUius' solution. 



Orthorhombic : &. c = i : 0.273 ( ?). 



Habit : The crystals of cubebin observed were rods elongated 

 on the c axis, wath a ratio of length to width of about 10: i ; 

 they were not well terminated. Three kinds of twinning were 

 observed, giving x-shaped or branched crystals ; the angles be- 

 tween the c axes in these twins measured about 40, 69 and 85 



* E. Schmidt, Lehrbuch der Pharmaceutischen Chemie. 



