476 Messrs. Wohler aiid Liebig on 



recrystallize on cooling : they are insoluble in aether ; on heat- 

 ing they fuse and are decomposed. 



On burning this salt with chi-oraate of lead, more accurate 

 numbers for the carbon and hydrogen were obtained than in 

 the analysis of thialdine itself or the hydrochlorate, a result 

 ^\'hich can easily be explained by the co-operation of the oxy- 

 gen in the nitric acid. 



0*357 gvm. of nitrate of thialdine gave 0"4155 grm. of car- 

 bonic acid and 0'2045 grm. of water. 



0*5 14 grm. of nitrate of thialdine gave 1'116 grm. of sul- 

 phide of silver. 



0*6696 grm. of nitrate of thialdine, when ignited with a 

 mixture of potassa and nitre, gave 1*4063 grm. of sulphate of 

 baryta ; the mean of the two latter experiments equals 28*4 

 per cent, of sulphur. 



These results lead to the following formula for nitrate of 

 thialdine,— c,2 H,3 N S^, H NOg, 



as will be seen by the following comparison between the 

 theoretical and experimental numbers : — 



Theory. Experiment. 



12 eqs. of Carbon .72 31*80 31*75 



14 ... Hydrogen 14 6*19 6*36 



2 ... Nitrogen 28 



4 ... Sulphur . 64 28*34 28*40 



6 ... Oxygen . 48 

 226 

 The formation of thialdine is easily accounted for : 3 eqs. 

 of aldehydite of ammonia and 6 eqs. of hydrosulphuric acid 

 transpose into ] eq. of thialdine, 6 eqs. of water, and 2 eqs. 

 of sulphide of ammonium. 



3 eqs. of Aldehydite of ammonia . CjgHgiNg 0(^ 

 6 ... of Hydrosulphuric acid . . Hg Sg 



Cjo H27 N3 Sg Og 



1 eq. of Thialdine Ci2H,3NS4 



6 eqs. of Water H g Og 



2 «*. of Sulphide of ammonium . H g Nj Sg 



C^H^NgSgOg 

 But the question respecting the real constitution of this 

 body is too closely connected with that of the true constitu- 

 tion of organic bases in general to admit of any definite 

 opinion being promulgated at this moment, when so few ex- 

 periments on the subject are as yet before us. Still we can 

 imagine how important for the general question facts like the 

 formation of thialdine may hereafter become, and that just 

 from this quarter perhaps a way for its solution may be ob- 



