Mr. Noad on the Action of Nitric Acid on Cymol. 33 



potash, in addition to ammonia and aqueous vajjour, a yellow 

 oil passed into the receiver, which did not however solidify 

 on cooHng, probably in consequence of the presence of am- 

 monia ; it was therefore saturated with oxalic acid, evapo- 

 rated to dryness in the water-bath, redissolved in boiling 

 alcohol and filtered ; on cooling, oxalate of toluidine sepa- 

 rated in fine white needles, these were washed, dissolved in 

 boiling water, and decomposed by potash; the toluidine, 

 which separated in colourless oily drops, was taken up by 

 sether, on the evaporation of which it remained in the form 

 of a ciystalline mass. Although the nature of this substance 

 was sufficiently obvious, nevertheless, to remove all doubt 

 respecting it, I converted it into the double platinum salt by 

 mixing it with hydrochloric acid and bichloride of platinum. 

 The beautiful orange-yellow spangular mass was washed with 

 gether and dried on the water-bath. Its analysis gave the 

 following result : — 



0-930 grm. gave by ignition 0-292 grm. of platinum = 

 31-398 per cent. 



This determination agrees with the formula for chloride of 

 platinum and toluidine — C,4 Hg N, H CI, PtCla- 



312-18 



By the production of toluylic and nitrotoluylic acids there 

 is not only filled up a gap which has hitherto existed in the 

 toluyle series, but an important step has been made in the 

 series of acids to which I have alluded at the commencement 

 of this paper, of which indeed at the present time a few scat- 

 tered members only are known. The following table presents 

 a general view of some of the most important members of the 

 different groups, and exhibits the gaps which remain to be 

 filled up by future experiments. 



Phil. Mas. S. 3. Vol. 32. No. 2 1 2. Jan. 1 848. D 



