OF ARTS AND SCIENCES. 227 



iu order to separate them. The fragments were then pulverized in a 

 mortar, extracted with dilute potash, washed clean, and boiled up 

 with 150-200 c.c. of absolute alcohol under a reverse cooler. This 

 alcoholic liquor gave, after treatment with bone-black and concentrat- 

 ing, a crystalline precipitate, which we purified with considerable 

 difficulty as the quantity was exceedingly small. We finally suc- 

 ceeded in getting a sufficient amount of it of constant melting point 

 (104-105°) for an analysis. 



0.1010 gr. substance gave 0.2537 gr. CO2 and 0.0392 gr. Bfi. 



Calculated for 

 ^ „ ) (1)N0.. Found. 



^8"^ i (2) CUCoUs. 



C 68.72 68.50 



H 3.97 4.31 



The yield is so small that we could not obtain a sufficient quantity 

 to enable us to examine its properties as fully as we could wish. All 

 attempts to increase the yield by varying the proportions, temperature, 

 time of heating, etc., were without effect. Benzol takes up little or 

 nothing from the raw product, and the same may be said of the other 

 common solvents with the exception of boiling absolute alcohol. Di- 

 lute alkalies extract more or less orthonitrobenzoic acid. The con- 

 centrated alcoholic solution remains clear for several days, then 

 manifests a slight turbidity, and finally deposits microscopic crystals. 

 In several instances we have succeeded in obtaining only a thick syrup 

 which could not be made to crystallize. 



From the analysis of the substance and the method of its prepara- 

 tion we conclude that it is the orthonitrobenzophenone described by 

 Geigy and Kouigs,* and interpret its formation by the following 

 reactions : — 



^'^' I (2) CO 



C H J (2) CO 4- C H I (1) N^= 



'"«"* I (2) CO 



^0 + 2 CeHe = 2 C,U, 1 1^^ cOCcIIs + ^'^ 



n H i ^2) CO 

 *"«"* 1(1) NO2 



* Ber. d. ch. G., XVITI. 2403. 



