864 
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 
Abies lasiocarpa 
(Hook.) Nutt—Con. 
Big Cottonwood Can¬ 
yon. 
Dn 
Spruce-fir_ 
do . 
Northern aspect. 
_do.. 
Feet 
8,500 
9,600 
mo-mi 
Sept. 12 
Sept. 20 
Degrees 
C. 
0.74 
0.98 
Atmos¬ 
pheres 
8.9 
11.8 
Do 
.do__ 
.do.. 
10,000 
Sept. 9 
0.72 
8.7 
Do 
Aspen-fir_ 
Canyon bottom_ 
7,200 
Dec. 6 
0.86 
10.4 
Do 
.-.Ado.. 
Lower southern aspect 
7,450 
Dec. 8 
1.35 
16.2 
Do 
_do_ 
Northern aspect. 
7,600 
Dec. 7 
1. 30 
15.6 
Do - . 
.do.. 
Western aspect... 
9,500 
-..do_ 
0.85 
10.2 
Dn 
Spruce-fir_ 
Northern aspect. 
9,500 
7,400 
-.-do_ 
1.12 
13.5 
Rpavp.r Crftftk 
Aspen-fir_ 
Eastern aspect. 
Sept. 16 
0.87 
10.5 
Do 
_do_ 
Canyon bottom. 
7,500 
...do- 
1.03 
12.4 
Taylor Canyon 
Spruce-fir _ 
Northern aspect_ 
7,800 
Jan. 4 
0.42 
5.1 
Do 
_ .do... 
.do.1.. 
8 ; 500 
Feb. 28 
0.74 
8.9 
Pinus flexilis James 
Big Cottonwood Can- 
Western yellow pine. 
Southern aspect. 
6,400 
July 21 
1.74 
20.9 
yon. 
Do.-. 
Aspen-fir. 
Northern aspect. 
7,500 
July 13 
1.27 
15.3 
Do 
_do_ 
Southern aspect. 
10,000 
July 15 
1.92 
22.1 
r>o 
Western yellow pine. 
Aspen-fir_ 
_do..1. 
6,400 
7,700 
Sept. 22 
1.16 
14.0 
Do 
Northern aspect. 
Sept. 7 
1.24 
14.9 
Do 
8,250 
9,600 
Sept. 20 
1.23 
14.8 
Do 
_do__. 
Western aspect... 
—do. 
1.04 
12.5 
Do__ 
Spruce-fir.- 
Northern aspect. 
10,000 
Sept. 9 
0.92 
11.1 
Do 
Western yellow pine. 
Aspen-fir.. 
Southern aspect. 
6,400 
Dec. 10 
1.14 
13.7 
Do.. 
Northern aspect. 
7,700 
Dec. 7 
0.99 
11.9 
Do . 
-..-'-do__ 
Western aspect_ 
9,500 
—.do. 
1.29 
15.5 
Beaver Creek 
__do_ 
Southern aspect. 
7,000 
Sept. 16 
1.64 
19.7 
Do . 
.do__ 
Northern aspect_ 
7,000 
Sept. 17 
c0.89 
10.7 
Taylor Canyon _ 
do —_ 
Southern aspect_ 
7,600 
Jan. 4 
0.79 
9.5 
Do ~ — _ 
.do.. 
8,500 
Feb. 28 
0.54 
6.5 
Do.. 
_do.. 
Northern aspect. 
8,500 
___do. 
0.67 
8.1 
Pinus conlorta Loud. 
"Roavor Croak __ 
Lodgepole pine.__ 
Bench in canyon bot- 
7,000 
Sept. 16 
1.46 
17.6 
Do . 
_do_ 
tom. 
.do__ 
7,300 
—do. 
1. 52 
18.3 
Do 
do . 
Flat divide. 
7,500 
—do. 
1.S9 
16.7 
Do . 
.do_ __ 
Bench in canyon bot- 
7,300 
—do. 
1.68 
20.2 
Big Cottonwood Can- 
Aspen-fir_ 
tom. & 
Canyon bottom 8 - 
7,400 
July 7 
1.42 
17.1 
yon. 
Do 
.do__ 
_do... 
7,400 
July 12 
1.44 
17.3 
Do 
_do-.. 
_do.-. 
7,400 
Dec. 8 
1.48 
17.8 
Pinus ponderosa Laws. 
Big Cottonwood Can- 
Aspen-fir... 
Southern aspect 8 .... 
7,200 
July 23 
1.15 
13.8 
yon. 
Do . 
_do.. 
.do.. 
7,200 
Dec. 10 
1.11 
13.4 
Do 
Chaparral_ 
_do. 
7,300 
July 25 
1.49 
17. 9 
Do 
Aspen-fir_ 
.do... 
7, 450 
July 27 
1.05 
12.6 
Do 
_*,do_ 
.do. 
7,500 
July 19 
1.43 
17.2 
Do.... 
_do. 
Canyon bottom 8 . - - - 
7,400 
July 7 
1.65 
18.6 
Do 
.do... 
.do.. 
7,400 
July 27 
1.35 
16.2 
Do 
.do_ 
_do_—. 
7,400 
Sept. 20 
1.S7 
16.5 
Do. 
_do_ 
Canyon bottom un- 
7,400 
Dec. 8 
1.34 
16.1 
Do 
_.do_ 
der 3 feet snow 8 — 
Canyon bottom 8 .... 
_do... 
7,400 
...do_ 
1.83 
22.0 
Do 
.do.. 
7,400 
7,400 
July 13 
1.20 
1JM 
Do 
_do_ 
_do... 
July 14 
1.16 
14.0 
Do. 
.do... 
Northern aspect 8 - 
7,450 
July 19 
1.42 
17.1 
Do...—. 
.do.- 
Canyon bottom 8 .... 
7,400 
Sept. 22 
0.97 
11.7 
Do. 
7,400 
Dec. 8 
1.25 
15.0 
Ogden, Utah_ 
City park 8 . 
4,350 
Jan. 25 
0.75 
9.0 
Pinus austriaca Hoss. 
Ogden, Utah.. 
City park 8 . 
4,350 
--.do. 
1.19 
14. S 
a Planted, species exotic to this site. c Sample collected after a heavy rain. 
*> Planted although native to site. 
