May 10,1924 
Nitrate and Ammonia in Nitrogenous Materials 
537 
Table VI. —-Comparison of the modified Strowd, Ulsch-Street and official magnesium 
oxid methods for ammoniacal nitrogen in fertilizers —Continued 
Number 
63619. 
Average. 
63621 
Average. 
63899. 
Average. 
64773. 
Average. 
64776. 
Average. 
64777. 
Average. 
64813 
Average. 
64828. 
Average. 
Official 
MgO 
method 
0. 44 
6 0. 44 
0. 44 
0. 78 
0. 76 
0. 77 
4. 54 
b 4. 48 
4. 51 
0. 18 
0. 45 
6 0. 45 
0. 45 
0. 79 
6 0. 77 
0. 78 
0. 96 
6 0. 93 
0. 95 
0. 15 
Modified Strowd 
method 
Filtered Not filtered 
Per cent 
0. 41 
. 37 
. 41 
. 40 
. 40 
. 81 
. 85 
. 81 
. 81 
. 82 
4. 64 
4. 59 
4. 60 
4. 61 
.23 
. 26 
. 25 
. 13 
. 22 
. 47 
. 46 
. 44 
. 46 
. 85 
.83 
. 83 
. 82 
Per cent 
0. 65 
.62 
. 60 
. 62 
89 
89 
84 
Ulsch-Street method 
Filtered Not filtered 
Per cent 
. 87 
4. 60 
4. 72 
4. 72 
4. 68 
. 38 
. 40 
. 41 
. 27 
37 
. 63 
.61 
. 55 
. 60 
. 83 
. 95 
. 93 
. 92 
. 91 
. 91 
. 92 
. 16 
. 17 
. 15 
. 13 
. 15 
1 . 00 
. 97 
1. 01 
. 92 
. 98 
1. 04 
1. 04 
1. 07 
1. 03 
1. 05 
35 
29 
28 
31 
3. 96 
«. 21 
Per cent 
0. 64 
. 87 
c 4. 54 
4. 56 
4. 55 
* .30 
. 33 
. 27 
.30 
. 51 
. 53 
52 
. 94 
.85 
. 90 
. 88 
1. 04 
. 96 
. 29 
& Results obtained by this method in the fertilizer department. 
c Volume of solution was 350 cc. and collected 150 cc. of distillate. In the official method the prescribed 
volume is less than 150 cc. and only 100 cc. of distillate could be obtained. The solution of acid and iron 
was boiled for 10 minutes instead of 5 minutes as recommended. 
