MICRO-ANALYSIS. 



823 



The scope of this vohime is necessarily Hmited but the ex- 

 amples which follow will be at least sufficient to show the 

 possibilities of the crystallographic method of study, 



ACONITINE (C34H47NO1J. 



Occurrence : See pp. 477-480. 



Aconitine (acetyl-benzoyl-aconine) occurs in colorless, nearly 

 transparent, glistening crystals. From alcoholic solution ortho- 

 rhombic prisms (Fig. 142) usually predominate while from 



^%^- 



i 



Fig. 329. Berberine hydrochloride: small orthorhombic .needles, from aqueous solution. 



solutions in which chlorofomi is the solvent, the tendency 

 is for small isolated rosette-aggregates to separate. The crystals 

 vary in length from o.i mm. to i mm., although crystals as 

 large as i cm. in length and 0.5 cm. in thickness have been 

 obtained. Upon rapidly heating the M. P. is ig'/-ig8 C. At 

 25 C. one part of aconitine is soluble in 3226 parts of water; 

 22 parts of alcohol ; 44 parts of ether; and 5.6 parts of benzene.* 



* Atherton Seidell, Solubilities of Inorganic and Organic Substances. 



