l'l R.INGTON.] 
CLIMATIC CONDITIONS. 
49 
Table 3. — Average dates of last spring and first fall frosts. 
[Computed by Cleveland Abbe, jr. Dates marked (?) arc from a single observation.] 
Juneau 
Ikagway 
Fort Liscum 
Kenai 
St. Michael 
Point Hope 
Camp Colonna . . 
Camp Davidson. 
Eagle 
Circle 
Fort Yukon 
Place. 
Last kill- 
ing frost. 
(?) 
Apr. 10 (?) 
(?) 
(?) 
June 1 (?) 
(?) 
(?) 
Junel5(?) 
May 10 (?) 
(?) 
(?) 
Last spring 
frost. 
Apr. 15 (?) 
June 1 (?) 
(?) 
Jllllc 1.") 
(?) 
(?) 
Apr. 30 (?) 
(?) 
(?) 
(?) 
(?) 
First fall 
frost. 
Sept. 20 
Aug. 30 
(?) 
Aug. 15 
Sept. 15 
Sept. 13 (?) 
(?) 
(?) 
Sept. 1 (?) 
Aug. 20 (?) 
Sept. 30 (?) 
First kill- 
ing frost. 
Sept. 
Sept. 
Sept. 
Aug. 
Sept. 
Oct. 
Oct. 
Aug. 
Sept. 
Nov. 
Oct. 
20 
5(?) 
29 
30 
30 (?) 
15 
15 (?) 
15 (?) 
2(?) 
1 (?) 
Table 4. — Average dates of opening and closing of Yukon and Kenai rivers. 
[Dates marked (?) are from a single observation.] 
Place. 
Yukon River: 
Fort Reliance . 
Eagle 
Circle 
Fort Yukon . . . 
Fort Gibbon... 
Tanana 
Nulato 
Anvik 
Kenai River: 
Kenai 
Ice breaks. 
May 
10 
May 
11 
May 
13 
May 
15 
(?) 
May 
15 
May 
20 
May 
15 
Mar. 18 (?) 
River 
clear. 
(?) 
May 15 
(?) 
May 20 
(?) 
May 20 
(?) 
May 22 
Mar. 29 (?) 
Ice run- 
ning. 
Oct. 20 
Oct. 5 
(?) 
Oct. 3 
Oct. 25 (?) 
Oct. 15 
(?) 
Oct. 25 
Dec. 5 (?) 
River 
closed. 
Nov. 5 
Nov. 10 
(?) 
Oct. 26 
Nov. 6 (?) 
Nov. 6 (?) 
Oct. 20 
Oct. 31 
Dec. 15 (?) 
Table 5. — Table of temperatures, Fahrenheit. 
1 
1 Station. 
Jan. 
Feb. 
Mar. 
Apr. 
May. 
June. 
July. 
Aug. 
Sept. 
Oct. 
Nov. 
Dec. 
Length 
record. 
Juneau 
L 7 aldez 
34.2 
23.8 
7.4 
-24.8 
33.0 
15.5 
-6.0 
37.2 
30.8 
8.9 
13.0 
41.9 
31.6 
19.9 
29.3 
46.9 
39.4 
33.1 
42.2 
51.6 
49.6 
46.3 
52.6 
54.4 
50.5 
53.6 
56.9 
56. 6 
46.6 
51.9 
49.1 
52. 3 
45.7 
39.8 
22.4 
15. 6 
-10.0 
36.0 
21.6 
4.8 
-7.4 
Yrs. Mos. 
5 a 18 
10 
pt. Michael 
Sagle 
43.9 
40.4 
30.5 
20.1 
11 -(12 
1 
i a Nonconsecutive months. 
STREAM VOLUMES. 
i THE MINER'S INCH. 
Before discus 
p consider the 
^ceived so man 
Bull. 263—0, 
sing 
unit 
y va 
the matter of stream volumes it will be necessary 
; of measurement, the ''miner's inch," which has 
rying definitions in different mining districts. 
1 
