May 3i, 1924 Cell Sap Density and Environmental Conditions 
863 
Table VII .—Freezing point depressions and osmotic pressures of the sap of trees 
classified by species } locality , type , sit uation f altitude , and date of collection —Con. 
[Numbers in italics represent averages of two or more determinations] 
Species and locality 
Type 
Situation 
Alti¬ 
tude 
Date of 
collec¬ 
tion 
Depres¬ 
sion of 
freezing 
point 
Os¬ 
motic 
pres¬ 
sure 
Abies concolor (Gord.) 
Parry 
Degrees 
Atmos - 
Feet 
1920-1921 
C. 
pheres 
Beaver Creek_ 
Aspen-fir. 
Eastern aspect. 
7,400 
Sept. 16 
1. 28 
15 4 
Taylor Canyon_ 
_do.. .. .. 
Northern aspect_ 
5, 200 
Jan. 4 
0.74 
8 9 
'Do_1. 
.do. 
.do.r_ 
7 ,800 
_do_ 
0.66 
8 0 
Ogden, Utah.. 
City park °_ 
4, 350 
Jan. 25 
1.04 
12 5 
Taylor Canyon.__ 
Aspen-fir... 
Northern aspect. 
5, 200 
Feb. 28 
0.98 
11.8 
'Do_I_ 
_.'.do. 
_do__ .1. 
7, 000 
...do_ 
1. 06 
12 8 
Do.. 
_do..... 
.do.. 
8; 500 
...do_ 
0.64 
7.7 
Picea parryarn (Andr6) 
Parry 
Big Cottonwood Can- 
Aspen-fir. 
Canyon bottom. 
7,000 
July 23 
1. 26 
15. 2 
yon. 
Do__ 
_do. 
.do.\.. 
7,200 
July 19 
1.37 
16. 5 
Do.. 
.do... 
.do... 
7,400 
July 13 
1.42 
17.1 
Do.. 
_do.. _‘i 
_do... 
7,400 
July 23 
1 . ii 
13.4 
Do.. 
_do. 
.do__ 
7 ,400 
July 25 
1.11 
13.4 
Do.. 
.do___ 
Lower southern aspect 
7,450 
July 26 
1.23 
14.8 
Do___ 
_do.. 
Canyon bottom. 
7\ 700 
July 24 
1.16 
14.0 
Do.. 
.do.. 
.do.. 
7, 000 
Sept. 20 
0.91 
11.0 
Do._.. 
_do.. 
.do... 
7, 200 
Sept. 22 
1. 00 
12.0 
Do.... 
_do. 
Lower southern aspect 
7, 450 
Sept. 7 
1.14 
13.7 
Do . 
_do. __ . 
Canyon bottom...... 
7, 000 
Dec. 10 
1. 02 
12.3 
Do... 
.do. 
.do.. 
7, 200 
Dec. 6 
1.34 
16.1 
Do... 
_do.. 
Lower southern aspect 
7,450 
Dec. 8 
1.40 
16.8 
Beaver Creek __ 
.do_ 
Canyon bottom ______ 
7,600 
Sept. 16 
1. 19 
14.3 
Big Cottonwood Can- 
...do . .. 
_.'do b ... 
7, 400 
July 11 
1.27 
15.8 
yon. 
Ogden, Utah_ 
City park a . 
4,350 
Jan. 25 
1.16 
14.0 
Picea engelmanni 
(Parry) Engelm. 
Big Cottonwood Can- 
Aspen-fir. 
Canyon bottom. 
7,200 
July 19 
1.G9 
13.1 
yon. 
Do.„ 
_do___ 
.do... 
7,400 
July 13 
1.45 
17.4 
Do . 
_do. 
Northern aspect_ 
7, 500 
July 27 
1.15 
13.8 
Do_ . .. 
Spruce-fir . ... 
.do.1.. 
8, 500 
July 24 
1.58 
19.0 
Do ... 
_do.. __ . 
_do... 
8,800 
July 25 
1.51 
18.2 
Do.. 
_do... 
Ridge top. 
10', 000 
July 15 
1.68 
19.0 
Do. 
Aspen-fir.. 
Canyon bottom. 
7, 200 
Sept. 22 
1.13 
13.6 
Do. 
_do... 
Northern aspect. 
8,250 
Sept. 20 
0.85 
10.2 
Do... 
Spruce-fir... 
.do... 
8,500 
Sept. 12 
0.97 
11.7 
Do.. 
__:._do... 
_do... 
9,600 
Sept. 20 
1.18 
14.2 
Do. 
_do... 
.do. 
10,000 
Sept. 9 
1.12 
13.5 
Do.. 
Aspen-fir__ 
Canyon bottom. 
7,200 
Dec. 6 
1. 29 
15.5 
Do. 
_'.do... 
Northern aspect_ 
7, 500 
Dec. 7 
1.40 
16.8 
Do... 
Spruce-fir. 
_do_. 
9, 500 
...do_ 
0.95 
11.4 
Beaver Creek_ 
Aspen-fir_ 
Canyon bottom_ 
7,600 
Sept. 16 
1.4S 
17.2 
Big Cottonwood Can- 
‘do 
_do b . 
7,400 
July 11 
1.32 
15.9 
yon. 
Do.. __ 
.do. 
.do 4 .. 
7,400 
July 25 
1.28 
15.4 
Abies lasiocarpa 
(Hook.) Nutt 
Big Cottonwood Can- 
Aspen-fir. _ . 
Canyon bottom_ 
7,200 
July 19 
1.10 
13.2 
yon. 
Do. 
.do.. 
_do.. 
7,400 
July 13 
1.45 
17.4 
Do. 
_do... 
Northern aspect_ 
7, 500 
July 12 
1.09 
13.1 
Do. 
.do. 
Lower southern aspect 
7,450 
July 26 
0.88 
10.6 
Do 
_do__ 
.do.. _____ 
7; 450 
July 27 
0.48 
5.8 
Do 
_do.. 
Northern aspect. 
7,700 
July 19 
1.51 
18.2 
Do. 
Spruce-fir.. 
.do.1.. 
81500 
July 24 
1.53 
18.4 
Do 
‘ .do. 
.do.__ 
8,800 
July 25 
1.26 
15.2 
Do. 
.do... 
Ridge top__ 
10 ; 000 
July 15 
1.64 
18.5 
Do. . 
Aspen-fir... 
Canyon bottom.. 
7, 200 
Sept. 22 
0.75 
9.0 
Do... 
.....do... 
Lower southern aspect 
7; 450 
Sept. 7 
0.83 
10.0 
Do... 
_do___ 
Northern aspect_ 
7,700 
..do... 
1.05 
12.6 
Do 
_do__ 
.do_2. 
8; 250 
Sept. 20 
0.83 
10.0 
Do. 
.do... 
Western aspect. 
9; 600 
...do_ 
0.99 
11.9 
a Planted, species exotic to this site. *> Planted although native to site. 
