392 vncntDBM. 



\vith etlier,' in order to separate 3 Jibantic acid. Finally tlid 

 flocks insoluble in etlier were dissolved in alcoliol, which 

 afforded a red solution with only sight bitterness. We pro- 

 visionally call this acid « Jibantic ackk 



The chief points of difference and resemblance between these 

 two acids may be summarised thus — bitterness, and easy 

 Bolubility of the /3 acid, when freshly precipitated^ in ether : 

 slight bitterness and insolubility of the a acid, when freshly 

 precipitated, in ether. The /3 acid is precipitated in lighter 

 coloured flocks from an alkaline solution than the a acid. Both 

 Q-cids are soluble with equal readiness in alkalies and cold absolute 

 alcohol. 



m 



VANDA ROXBURGHII, Br. 



F 



Fig.—Bot. Reg., t. 506; JfigM Jc, t. 9] 6; FL des Sores, 

 ii., f. II ; Beichh. FL Exot.^ ^.121. 



Hab. — Bengal, Behar, Guzerat, Concan to Travancore> 

 The roots. 



SACCOLABIUM PAPILLOSUM, i^^«^^^ 



Fig.— -Bo^. Reg., t 1552. 



Hab.- — Bengal and the Lower Himalaya, Assam, the 

 txangetic Delta, the Circars and Tenasserim. The roots. 

 Vernacular, — E-asna [Ind. Bazars)^ 



History, Uses, 8lC^ — We have already stated (Tol. n> 



J). 260) that we consider it probable that th^e original Easna of 



the Arians was Inula Meleniiun, as the two drugs at the head 



^f this article arc notably deficient in the propertie:^ ascribed to 



Rasua by Sanskrit writers ; for instance, the plants under 



consideration cannot be described as Gandha-mula ^'hai-iug a 



strong smelling root." Dutt {iilaL Af^d., p. 258) remarks : 



*' Under the name of rasna, the roots of Vanda Roxhiiryhii and 



Aavnpe prfpUfom are both indiscriminately used by native 



physicians. They are very similar in the appearance of their 



voots and leaves, thoun;b they diiXcr much in their flowers and 



