306 DR T. H. ROWNEY ON THE 



Croton Oil. 



Croton oil yields a small quantity of amide, and the mother liquor when con- 

 centrated by evaporation contains a dark oily substance. The amide requires 

 several crystallizations from alcohol to render it pure. It crystallizes in mam- 

 millated groups, and when dry is light and bulky. Its fusing point is 100° C. 



The analysis of this substance gave the following results : — 



2258 grammes of substance gave 

 6235 ... of carbonic acid, and 

 2598 ... of water. 



2153 grammes of substance gave 

 5962 ... of carbonic acid, and 

 2528 ... of water. 



2900 grammes of substance gave 

 0142 ... of nitrogen. 



II. 

 III. 



I. II. III. Mean. 



Carbon, . . 75-30 75-52 ... 75-41 



Hydrogen, . . 12-78 1304 ... 1291 



Nitrogen, ... 4-83 4-83 



The nitrogen in this analysis is rather too low, and unfortunately I had no 

 more substance with which to make another determination ; but, however, the 

 results altogether are sufficient to show that the substance was margaramide. 



Seal Oil. 



Seal oil is readily acted upon by ammonia, and yields a considerable quantity 

 of amide ; the mother liquor contains a large amount of resinous and oily matter, 

 which separates by evaporation. The amide is readily purified by crystalliza- 

 tion from alcohol, in which it is very soluble. When pure and dry, it forms a 

 rather dense and crystalline powder, fusing at 82° C, and is transparent when 

 cold. 



By analysis the following numbers were obtained, which correspond with 

 those for oleamide, though the hydrogen is somewhat too high. 



f -2125 grammes of substance gave 

 I. < -5980 ... of carbonic acid, and 

 { -2475 ... of water. 



j r f -2133 grammes of substance gave 

 "< -5995 ... of carbonic acid, and 

 \ -2475 ... of water. 



-j-j-j. f -3145 grammes of substance gave 

 '\-0158 ... of nitrogen. 



TV f -3255 grammes of substance gave 

 " \ -0158 ... of nitrogen. 



