42 ART. 15— TAMEMASA HAGA. 



for two days, and then boiled till colourless. During the boiling a 

 reflux condenser was used to retain the water in the solution. 

 Expt. 3. — 'A solution weighing 120.42 grains and measuring 120 

 c.c. of 1*22 grams of salt and 11*4 c.c. of N/10 potassium hydroxide 

 was decomposed by boiling. Expt. 4. — The solution weighed 134.9 

 grams and contained 1*8576 grams of salt and 30 c.c. of N/10 

 potassium hydroxide ; it was decomposed by boiling. Expt. 5. — A 

 solution of 0.6601 grams of salt and 20 c.c. of N/10 potassium 

 hydroxide, weighing 34"25 grams, was left in the cold for a week, 

 when it had become colourless. Expt. 6 — Like the last, but the 

 solution weighed 266*7 grams and the salt 5*27 grams, whilst the 

 potassium hydroxide was taken in about the same proportion as be- 

 fore. Expt. 7. — The solution was a portion of the same as had been 

 used for Expt. 2. When kept in a closely stoppered flask, it had only 

 lost all its colour after about five months. Expt. 8. — This experi- 

 ment differed from the others in the use of baryta-water in place of 

 potassium hydroxide, and to this must be attributed the production 

 of so much sulphate and hydroxylaminedisulphonate. The solution 

 took a month to lose all its colour. 



In the table, the numbers of molecules of the several products 

 yielded by 100(SO 3 K) 4 N 3 O ;i are given according to calculation from 

 the analyses made in the way above described, and without any 

 corrections for the probable, but variable, errors inherent in the method. 



Mol. weight. 1. 2. 



(S0 3 K) 3 XO, 85 102*3 101*7 

 (S0 3 K) 2 NOH, 61 30 



S0 4 K1I, 23 33 



HNO,, 49 36 



Without further experiments, it does not seem possible to account 

 for the wide variations in these numbers, except where baryta was 



