Van 
After leaving the six pairs of cylinders for 24 hours at room 
temperature, shaking through the Soja-meal from time to time, the 
connections with the absorbing cylinders were opened and 250 c.c. 
of saturated potassium carbonate was run into each of the larger 
cylinders through the long tubes. By then passing through for 
24 hours vigorous currents of air, washed through sulphuric acid, all 
the ammonia was blown over into the sulphuric acid. 
A few drops of octyl-aleohol, run in at the same time with the 
Soja-meal, prevented foaming. 
The quantities of ammonium carbonate and sulphuric acid were 
chosen such, that only a few c.c. of NaOH +; N were required to 
titrate the ‘free sulphuric acid, which was left. 
The results of a preliminary experiment on March 14'., 1916 
were as follows: 
TABLE 22. 
C.C. NH; ao N in: 
| | | Mean __ | NH3 converted into urea 
| 
Amm. carb. alone | 735.8: |'735.9 | 735.85 
Amm. carb. + 3 g.of Sojal 735.15 | 134.85 | 735.— | 0.85 
Amm. carb. + 6 g of Soja 734.85 734.15 | 7348 1.05 
Afterwards, however, it became evident, that an appreciable quan- 
tity of NH, was developed from the Soja-meal *). 
In order to estimate this, in each of two large cylinders 250 c.c. 
of saturated potassium carbonate, 100 c.c. of water and 4 drops of 
octyl-aleohol were introduced. Moreover in the one 6, in the other 
12 g. of Soja-meal. Each was connected with one of the small 
cylinders, into which 5 c.c. H,SO,2#N and some water had been 
brought. After some 5 hours of blowing through the whole was 
left at room temperature till the next day and the blowing was 
started again and continued till the following day. 
The 6 g. of Soja-meal had given 1,1 c.c. of NH, 75 N. 
The 12 g. of Soja-meal 1,65 c.c. of NH, 7) N. 
Hence in the mean for 6 g. of Soja-meal 0,97 cc. + N. 
1) Special experiments established that no NH3 was formed out of urea by the 
prolonged action of saturated potassium carbonate. 
