Art. 3.-T. Shibata: 



analysis the results obtained agreed with those required by 



CH,— CH C(CoHäX, 



diphenylcampliohde, 



C(CH,,)., Ü 



I '" I 

 CK,— OCCHg) —CO 



0-1541 gave 0-4664 CO. and 0-1043 HA C = 82-54 ; H = 7-75. 

 C-isHstO, requires C = 82-45 ; H=7-56 per cent. 



That this substance is diphenylcampholide was proved by the 

 action of alcoholic potash and of nitric acid upon it. 



The action of alcoholic j^otash : — Diphenylcampholide, dissolved 

 in alcohol, was heated on a water-bath for about twenty hours 

 with an excess of alcoholic potash. On adding a large amount 

 of water, a small quantity of the original substance separated 

 out, and was filtered off. The filtrate was evaporated on a 

 water-bath with repeated additions of Avater to remove tlie 

 alcohol, and the aqueous solution was acidified witli liydrochloric 

 acid. White amorphous precipitates, thus formed, were collected 

 on a filter, well washed, and dried in a vacuum desiccator over 

 sulphuric acid. The acidic substance thus obtained contains Avater 

 of crystallisation, and melts indefinitely above 100°, with previous 

 sintering at about 60°. When this substance is dissolved in ether, 

 the water of crystallisation separates out, and on driving off the 

 ether from the etherial solution, an oily substance is left. As thus 

 this substance could not be purified, its barium salt was prepared 

 by adding barium chloride to a solution of its sodium salt. After 

 drying it at 120°, it was analysed and proved to be barium 



diphenyloxycampholate, ftlgHnXc^ qJ^-' jBa: — 



0-2458 dried salt gave 0-0699 BaSO,. Ba= 16-73. 

 CiiHjoOßBa requires Ba= 16-92 per cent. 



