862 
Journal of Agricultural Research 
Vol. XXVIII, No. 9 
Table VII. — Freezing point depressions and osmotic pressures of the sap of trees 
classified by species, locality, type , situation, 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 
Juniperus scopulorum 
Sarg. 
Beaver Creek. 
Do... 
Western yellow pine.. 
... .do.. 
Southern aspect_ 
.do_ 
Feet 
7,000 
7,300 
..7, 600 
1920-1921 
Sept. 16 
...do_ 
Degrees 
C. 
1. 40 
1.55 
Atmos¬ 
pheres 
16.8 
18. 6 
Do. 
_do__.. 
.do... 
...do.. . 
1.39 
16.7 
Ogden, Utah_ 
City park o__. 
4,350 
5,200 
6, 600 
Jan. 25 
2.23 
26.8 
Taylor Canyon- 
Do.. 
Aspen-fir.. 
Juniper.. 
Northern aspect_ 
Southern aspect. 
Jan. 4 
...do_ 
2. 20 
2. 06 
26.4 
24.8 
Do 
.do... 
_do... 
7,600 
5, 200 
8, 500 
6, 400 
...do_ 
2. 01 
24.2 
Do _ 
Aspen-fir... 
Northern aspect_ 
Feb. 28 
1. 75 
21.0 
Do. 
Juniper. 
Southern aspect. 
...do_ 
2. 84 
34.1 
Pseudotsuga taxifolia 
(Lam.) Britton 
Big Cottonwood Can- 
Western yellow pine. 
Southern aspect. 
July 21 
i.n 
20.9 
yon. 
Do 
Aspen-fir.. _ 
Canvon bottom. 
7,400 
7, 400 
7, 500 
7, 500 
7, 600 
7, 700 
July 23 
July 25 
1.16 
110 
16.4 
Do _ 
__ __do_ . 
_do _ 
1.36 
Do . 
.do.. 
Southern aspect_ 
July 19 
1. 62 
19. 5 
Do 
_do ... 
_do_.. 
July 26 
July 13 
1. 54 
18. 5 
Do 
_do.... 
Northern aspect_ 
1.62 
19.5 
Do 
_do __ 
_do.... 
July 19 
1.70 
20.4 
19.0 
Do 
Spruce-fir.. 
_do .. 
8; 500 
6,400 
July 24 
Sept. 22 
1. 58 
Do. 
Western yellow pine. 
Aspen-fir__ 
Southern aspect_ 
1.41 
17. 0 
Do 
_do_. 
7, 500 
7, 500 
7, 500 
7, 700 
Sept. 7 
Sept. 10 
Sept. 12 
Sept. 7 
Sept. 20 
Sept. 12 
1. 32 
15.9 
Do 
_do... 
.do_ 
0. 90 
10.8 
Do 
_do_ 
_do... 
1.15 
13.8 
Do 
_do ... 
Northern aspect_ 
1.41 
17.0 
Do 
_do_ 
_do . 
8, 250 
8,500 
8, 500 
9,600 
10,000 
1.04 
12. 5 
Do 
Spruce-fir.. 
_.do __ 
1.18 
14.2 
Do 
Aspen-fir.. 
Western aspect.. 
Sept. 20 
0.98 
11.8 
Do 
do . 
_do_1. 
-..do 
1.07 
12.9 
Do. 
_do .. 
Southern aspect_ 
Sept. 9 
0.89 
10.7 
Do 
Western yellow pine. 
Aspen-flr.... 
_do ...1. 
6,400 
7, 500 
Dec. 10 
1.32 
15.9 
Do 
_do.... _ 
Dec. 6 
1.24 
14.9 
Do 
_do ___ 
Northern aspect. 
7, 600 
Dec. 7 
1. 32 
15.9 
Do 
_do__. 
Western aspect_ 
9, 500 
-_.do .. 
1.05 
12.6 
Beaver Creek 
_do_ 
Norther n aspect..... 
7 ,000 
7,300 
7,400 
7, 600 
5, 200 
7, 800 
5, 200 
7,000 
8, 500 
Sept. 17 
Sept. 18 
c0. 79 
9.5 
Do 
_do.- 
Eastern aspect_ 
1.75 
21.0 
Do _ 
_do_ 
_do_.. 
...do_ 
1.75 
21.0 
Do 
_do... 
_do _ 
...do_ 
1. 62 
19.5 
Taylor Canyon 
. ...do. . 
Northern aspect_ 
Jan. 4 
0. 57 
6.9 
Do 
_do .. 
_do _ 
...do_ 
0. 57 
6.9 
Do 
_do .. 
_do... 
Feb. 28 
0.74 
8.9 
Do 
_do... 
_do __ _ 
...do_ 
0. 66 
8.0 
Do 
_do ... 
_do . 
_..do._ . 
0. 66 
8.0 
Big Cottonwood Can- 
.do.. 
Canyon bottom &_ 
7 ,400 
July 27 
1.59 
19.1 
Jr yon. 
Do 
_do. 
_do.. _... 
7,400 
4,350 
5, 500 
6, 400 
Sept. 22 
Jan. 25 
1.50 
18.0 
Ogden, Utah _ _ 
City park . 
0. 92 
11.1 
Abies concolor (Gord.) 
Parry 
Big Cottonwood Can¬ 
yon. 
Do. 
Aspen-fir.. 
Northern aspect.. 
July 21 
...do.. 
1. 66 
20.0 
Western yellow pine. 
Southern aspect_ 
1.96 
23.6 
Do 
Aspen-fir.. 
_do__ 
7; 500 
7, 500 
July 19 
1.30 
15.6 
Do 
.....do.. 
_do.. 
July 26 
1.35 
16.2 
Do 
_do. 
Northern aspect... 
7,600 
7,700 
July 13 
1. 71 
20.6 
Do 
_do__ 
.do.:. 
July 19 
Sept. 22 
Sept. 7 
Sept. 10 
Sept. 12 
Sept. 7 
Sept. 20 
1.52 
18.3 
Do _ . 
Western yellow pine. 
Aspen-fir_ 
Southern aspect_ 
6,400 
7, 500 
7, 500 
7,500 
7,700 
1.15 
13.8 
Do 
_ ...do.. 
1.32 
15.9 
Do * 
.....do. 
.do.. 
0. 93 
11.2 
Do 
.do_ 
_do__ 
1. 07 
12.9 
Do 
_do.. 
Northern aspect_ 
1. 20 
14.4 
Do 
....do__ 
_do.1_ 
8', 250 
8,650 
6,400 
1. 04 
12.5 
Do 
_do.. 
Ridge top.. 
1.19 
14.3 
Do.. 
Western yellow pine. 
Aspen-fir... 
Southern aspect_ 
Dec. 10 
0.83 
10.0 
Do 
_do... 
7,500 
7,600 
8,000 
Dec. 6 
1. 35 
16.2 
Do 
_*_do. 
Northern aspect_ 
Dec. 7 
1. 28 
15.4 
Do_ 
_do.- 
Ridge top...*.... 
...do_ 
1. 47 
17.7 
a Planted, species exotic to this site. c Sample collected after a heavy rain. 
6 Planted although native to site. 
