Nov. 1, 1924 
Dustfall of February 13, 1923 
449 
Table VIII. — Number of spores per cubic centimeter of melted snow 
A. SAMPLE NO. 1 
Number of determinations 
Kind of spore 
1 
2 
3 
4 
5 
6 
Aver¬ 
age 
Alternaria sp_ 
0.22 
0 
0 
0 
0 
0 
0.04 
Fusarium sp_____ 
0 
0 
0 
0 
.22 
0 
.04 
Helminthosporium sp _ ... 
.22 
.44 
0 
.22 
0 
.66 
. 26 
Rusts, urediniospores___ 
.22 
.22 
0 
.22 
0 
.44 
. 19 
Rusts, teliospores__ 
0 
0 
0 
0 
0 
0 
0 
Smuts___ 
0 
.22 
.22 
0 
0 
0 
.07 
Miscellaneous spores__ 
.44 
.88 
.44 
.44 
.22 
.88 
.55 
Mycelium__ 
.66 
.44 
.66 
.44 
.44 
1.10 
.62 
B. SAMPLE NO. 2 
Alternaria sp.. 
Helminthosporium sp.. _ 
Rusts, urediniospores... 
Rusts, teliospores.. 
Miscellaneous spores_ 
Mscellaneous mycelium 
0 
0 
0. 22 
0 
0. 22 
0 
0 
.22 
0 
.66 
0 
0 
.44 
.44 
.22 
0 
0 
0 
0 
0 
.44 
.88 
1.10 
.44 
.88 
.44 
.44 
.66 
.44 
0 
0. 09 
. 18 
.22 
0 
.75 
.20 
C. SAMPLE NO. 3 
Kind of spore 
Number of determinations 
1 
2 
3 
4 
5 
Aver¬ 
age 
Rusts, urediniospores. _____ 
Miscellaneous spores___ 
Miscellaneous mycelium_ _ 
0. 22 
1. 54 
.88 
0 
.88 
.44 
0 
.88 
0 
0 
.66 
.44 
0 
1. 32 
.44 
0.04 
1.06 
.44 
D. SAMPLE NO. 4« 
Alternaria sp....... 
0 
0.22 
0 
0 
0 
0.04 
Helminthosporium sp___ 
.22 1 
.22 
0 
0 
0 
.09 
Rusts, urediniospores. _ 
.22 | 
0 
0 
0 
0 
.04 
Rusts, teliospores.. __ 
0 
0 
0 
.22 
0 
.04 
Miscellaneous spores__ 
.22 j 
0 
0 
.22 
. 22 
. 13 
Mycelium __ _ 
0 ! 
.44 
.22 
0 
0 
. 13 
E. SAMPLE NO. 5« 
Alternaria sp....... 
0 
0 
0 
0 
0.22 
0 . 04 
Helminthosporium sp... 
0 
I 0 
0 
0 
0 
0 
Rusts, urediniospores____ 
0 
! 0 
0 
0 
0 
0 
Rusts, teliospores__ 
.22 
1 0 
0 
0 
0 
.04 
Miscellaneous spores__ 
.44 
0 
.44 
.44 
0 
.27 
Mycelium.. ...__ 
0 
! o 
0 
0 
0 
0 
a Samples 4 and 5 contained too many mineral particles to count directly, therefore the melted snow was 
allowed to stand until the heavy particles settled out, when the counts were made on the decanted solution. 
