Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Hall
1955
322
Oct 22 Sage Hen Creek, 3 mi. NW Hobart Mills, Nevada Co.Cali.
Lower 9:25 AM. at bend area on way to lower cory
there were several new dams, one, 20"
high, made entirely of unpeeled willow
twigs with the leaves still on them.
The dam just below this which appeared
this summer has been lengthened so
much that the pond behind it is now
almost as wide as the valley floor.
Ran willow samples
E
A
Use
Clump
Available
as of this spring
A
1
(38+use) x 20"
B
2
78 + use x 15"
C
9
530 + use x 22"
D series
0
6600 + use x 25"
E
13
280 + use x 20"
A
Use
Clump
B
52
C
0
D
3
E
2
F
8
G
1
B
Use
Clump
A
5
B
0
C
0
D
2
E
16
F
Use
Clump
Avail. in
Spring
A
4
70 + use x 35"
B
2
100 + U x 35"
C
7
187 + U x 24"
D
0
110 + U x 30"
E
10
26 + U x 27"
F
62
150+U x 26"
G
7
40+U x 30"
H
15
360+U x 38"
I
4
25
J
11
15-
clump
Use
A
9
125+U x 32"
B
7
400 + U x 40"
C
0
4 + U x 18"
D
0
55+ U x 21"
E
0
500 + U x 23"
F
3
200 + U x 25"
G
0
5 + U x 15"
H
0
141+U x 20"
I
0
9 + U x 15"
clump
Use
Avail.
Important part of the inaccuracy of my
method stems from fact it is not practical
to measure diams. So 4 big stems, if
cut, receive no more "credit" than 4 small
ones yet may represent the material of
25 small ones. Think 3 is about right for