28 Mr. Noad on the Action of Nitric Acid on Ctjmol. 



I. 0-396 gi'm. gave 0*486 carbonic acid and 0*85 water. 



II. 0-372 grm. gave 0-139 silver. 



III. 0-2935 grm. gave O'llO silver. 



These numbers correspond in per cents, to — 



II. III. 



37*36 37-47 



And by comparing them with the preceding they will be 

 found sufficiently near to warrant the conclusion that the two 

 carbo-hydrogens are identical. On treating the acid formed 

 by the action of fuming nitric acid on camphogene with am- 

 monia, the same heavy oil which was observed in the case of 

 cymol separated, and after a v, hile crystallized ; but from the 

 small quantity of camphogene at my command, I was unable 

 to procure sufficient of this substance for a comparative ex- 

 periment, or to bring forward any additional proof of the 

 identity of the two oils. 



Niirotoluylate of Lime. — This salt was prepared by decom- 

 posing nitrotoluylate of ammonia by chloride of calcium. It 

 fell as a granular crystalline mass, much more soluble in water 

 than the corresponding baryta salt, and crystallizing out of 

 its aqueous solution in small clustering groups of oblique 

 rhombic prisms ; it was obtained perfectly pure by two or 

 three recrystallizations. 



Analysis. — 0-6965 grm. gave by ignition, treatment with 

 carbonate of ammonia, and a second gentle ignition, 0-1775 

 grm. carbonate of lime= 14-27 per cent, of lime, agreeing ex- 

 actly with the formula Ca, OCjg< -j^^ fOg* 



Theory. Experiment. 



« 



1 equiv. Anhydrous acid 171'50 



1 ... Lime. . . . 28-5 14-25 14-27 



200-00 



Nitrotoluylate of Owide of Ethyle. — A solution of the pure 

 acid in strong alcohol was submitted to a current of dry hy- 

 drochloric acid gas till copious fumes were evolved ; it was 

 then distilled ; the first portions that passed into the receiver 

 consisted of a mixture of alcohol and hydrochloric aether ; the 

 distillation was continued until a few drops collected on a 

 watch-glass gave a milkiness when mixed with water ; it was 

 then stopped, and the retort allowed to cool ; a considerable 

 quantity of the yellow heavy oil collected at the bottom of 

 the .vessel, which was poured off into a beaker; in a few 



