210 
THIRTEENTH REPORT. 
garden crop had been raised. The entire plat was 20x60 feet. This was 
divided into three equal squares, which were treated as follows: 
Plat I, was untilled and unfertilized. 
Plat II, tilled but unfertilized. 
Plat III, both well tilled and well fertilized with manure. 
This is graphically shown by the following chart: 
Plat I. 
Plat 11. 
Plat III. 
Untilled and 
Tilled and 
Tilled and fertilized 
unfertilized. 
unfertilized. 
with manure. 
The studies of distribution according to depth, were made on all of 
these plats. Samples were taken in duplicate, and in different positions 
on each plat. Three depths were tried at first ; viz., 2 cm., S cm. and 14 
cm. The following table indicates the samples taken with the dates of 
the different series : 
Date. 
Plat. 
Number of samples. 
Depths in 
cm. 
April 2R 
I 
2 series in duplicate 
2, S, 14 
July 12 
I 
2 series in duplicate 
2, 8, 14 
July 12 
II 
2 series in duplicate 
2, 8, 14 
III 
1 series in duplicate 
4, 12 
Oftohpr 12 
I 
1 series in duplicate 
4. 12 
Opfohpr 12 
II 
1 series in duplicate 
4, 12 
III 
1 series in duplicate 
4, 12 
A series in duplicate, indicates a set consisting of two samples at each 
level given, the duplicates being taken at the same level as near as pos- 
sible at the same spot, perhaps an inch or two apart. 
When my celia had become 3-5 cm. in diameter, countings were made of 
the number in each plate, as accurately as possible without special de- 
vice. A summary of a tabulation of these data is here given. 
Average number of mycelia at. each depth. 
Plat. 
• 
2 cm. 
4 cm . 
8 cm . 
12 cm. 
14 cm. 
Plat x 
68.6 
21.5 
52.3 
29.0 
54.3 
Plat II 
101.5 
32.5 
59.5 
35 . 5 
50 . 0 
Plat TTT 
17.8 
36 . 0 
2S.0 
20.0 
62 . 3 
30 0 
55.9 
30.8 
41 .4 
