48 
DR. NOAD ON SOME OF THE PRODUCTS OF 
It has all the chemical functions of ordinary urea, its taste is cooling and slightly 
bitter; it is very soluble in water, alcohol, and ether. Its aqueous solution may be 
kept for some time without change, but after some weeks it acquires a brownish 
colour, and flocculent matter is deposited. It is a true organic base, and forms cry- 
stalline compounds with several acids. On dissolving some of the crystals in weak 
nitric acid and placing the solution under a bell jar over sulphuric acid, the whole 
soon became a crystalline mass ; and when the small quantity of adhering nitric acid 
was removed by affusion with cold water, and the crystals dissolved and boiled with 
animal charcoal, the nitrate was obtained by spontaneous evaporation in large and 
nearly colourless thin plates, the taste of which was cooling and slightly bitter, hardly 
to be distinguished from that of nitre. By dissolving some of the crystals in dilute 
oxalic acid, and placing the filtered solution over sulphuric acid, a crystalline mass 
was obtained, from which the oxalate of the new base was obtained in long, transpa- 
rent, and nearly colourless needles, by washing away as before the excess of acid, 
redissolving in water, and allowing the solution to crystallize spontaneously. The 
limited quantity of this substance at my disposal, and the very great difficulty of pre- 
paring it, prevented my making a quantitative determination of any of its salts. 
When heated a little above its fusing-point the base takes fire, burning with a red 
smoky flame and leaving much carbon. I propose for it the name of toluyl-urea ; its 
relation with Chancel’s compound and with the urea type appears from the following 
synopsis : — 
Urea . . . . C 2 H 4 N 2 () 2 
Anilo-urea . . C 2 H 3 (C 12 H 5 ) N 2 0 2 
Toluyl-urea . . C 2 H 3 (C u H 7 ) N 2 0 2 . 
Product of the Decomposition of Toluyl-urea. 
On heating some of the pulverized crystals strongly with caustic potash, ammonia 
was first disengaged, and then toluidine distilled over ; when, however, an aqueous 
solution was boiled with a solution of caustic potash till ammonia ceased to be evolved 
and the potash then neutralized with an acid, the acid being left slightly in excess, a 
clear yellow liquid was obtained, from which after a few hours’ standing there was 
deposited a group of magnificent golden-yellow needles, which only required a second 
solution and crystallization to render them perfectly pure. They were dried first 
between folds of filtering paper, then reduced to powder and thoroughly dried in the 
air-bath, after which they underwent no further loss of weight by being fused. 
Analysis . — This was made in the ordinary manner by combustion with oxide of 
copper. 
I. ’3355 grm. produced 780 grm. carbonic acid and T88grm. water, 
II. ’4042 grm. gave •OSOgrm. carbonic acid and *224 grm. water, 
corresponding centesimally to 
I. II. 
Carbon .... 63'46 63 22 
Hydrogen. . . . 622 6’ 15 
