430 
[Vor. 3 
ANNALS OF THE MISSOURI BOTANICAL GARDEN 
scribed on page 424. Where no letters are given there are 
sufficient indications in column v to identify the culture 
medium employed. Data for all of the flasks analyzed are 
included in the table in order that the extent of the experi- 
mental error may appear just as well as the average of the 
determinations made. 
TABLE I 
NITROGEN FIXATION IN CERTAIN FUNGI AND BACTERIA 
I II III | IV V VI VII VHI- 
otal N in Total Nin |р. 
а + Е Geer EN pe 224 там: a flasks, N-fixa- 
ый Organism °С, gr. and C supplied, gb mg tion 
: days per cent Comp. | Aver- | Comp. | Aver- | | 
data age data age 8. 
1A |Aspergillus | 30 | 30| .7 asparagin | 62.51 2.510 
парег..... 3.6 dextrose | 62.545 |62.732| 62.335 | 62.382] .350 
63.14 3 
2А |A.niger.....| 30| 30| .7 asparagin | 61.215 1.915 
1.8 dextrose | 61.985 | 61,915 | 59.710 | 61.180} .735 
2.545 1.915 
ЗА |А. niger....| 30 | 30| .014 asparagin | 2.135 2.310 
108 dextrose | 1.925 | 1.960] 1.995 | 2.018 | —.058 
1.820 1.750 
4A |А. niger..... 30 | 30| .7 asparagin | 60.30 60.375 
18.2 dextrose | 59.955 | 60.083 | 60.585 | 60.488 | —.405 
59.990 
SB |А. niger.....| 30| 30| .014 (КН) ХО 1.435 1.470 
3.6 extrose 1.575 | 1.470| 1.505 | 1.470 | ———— 
1.400 1.435 
6B A. niger ...| 30 | 30 i (NH.):SO, 70.38 0.49 
18.2 dextrose 70.420 | 70.417 | 70.490 | 70.547 | —.130 
70.455 0.560 
7B |А. niger.....| 30| 30| .014 (КН) ХО 1.71 .68 
18.2 dextrose 1.715 | 1.715| 1.750 | 1.715 | ——— 
1.715 
8B |Macrospo- | 25 | 30] .014 (NH,):SO.| 2.030 1.925 
rium сот- 18.2 dextrose 2.153 | 2.091| 2.065 | 1.995] .097 
типе. .... 1.995 
9B |М. commune 30| 7| 7 (МН,).50,| 70.38 0.42 
18.2 dextrose | 70.420 | 70.373 | 70.560 | 70.548 | —.175 
0.315 0.665 
10В |M. commune| 30| 7 .014 a 1.755 .065 
18. dextr 1.890 | 1.810| 2.205 | 2.065| —.255 
1.785 .925 
11B |M. commune| 25 | 30 tego bie ‚613 858 
18.2 dextrose 753 dia -683 .747 | —.035 
110 „100 
