42 
PROGRESS REPORT, HYDROGRAPHY, 1893 AND 3894. [bull.13L 
root of a tree 25 feet southwest of the end of the inclined gage. Both 
bench marks are 7.54 feet above the datum of the gage. 
The station is equipped with a flatboat, 4 feet wide and 14 feet long, 
attached by rope and tackle to a five-eighths-inch wire cable fastened to 
a large cottonwood tree on the left bank, and to a sand anchor on the 
right bank. The inclined gage is 2 inches by 6 inches. On March 
9, J"890, the gage was carried away by the ice, and was replaced on 
March 22. A self-recording nilometer was erected at this station, but 
after trial it was found that better results could be obtained by daily 
readings. 
Daily gage height of Bio Grande at Del Norte, Colorado, for 1893. 
Day 
Jan. 
Apr. 
May. 
June. 
July. 
Aug. 
Sept. 
Oct. 
Nov. 
Dec. 
l 
3.15 
3.10 
3.10 
3.10 
3.10 
3.10 
3.05 
3.05 
3.00 
3.00 
2.95 
2.90 
2.90 
2.90 
2.90 
2.95 
2.95 
2.90 
2.90 
2.85 
2.85 
2.80 
2.80 
2.80 
2.80 
2.85 
2.90 
2.95 
3.00 
2.95 
2.90 
1.80 
1.85 
1.90 
2.05 
2.20 
2.15 
2.10 
2.05 
2.05 
2.05 
2.10 
2.05 
2.00 
1.95 
1.90 
1.95 
2.00 
2.10 
2.15 
2.10 
2.10 
2.20 
2.25 
2.40 
2.65 
2.80 
2.90 
2.95 
3.05 
3.00 
2.80 
2.75 
2.70 
2.65 
2.60 
2.60 
2.70 
2.70 
2.80 
2.85 
3.00 
3.35 
3.80 
3.90 
3.95 
4.20 
4.40 
4.90 
4.90 
4.85 
4.85 
4.75 
4.85 
4.80 
4.65 
4.40 
4.25 
4.20 
4.10 
4.25 
4.35 
4.40 
4.50 
4.50 
4.60 
4.40 
4.20 
4.20 
4.50 
4.50 
4.50 
4.40 
4.30 
4.20 
3.90 
3.80 
3.70 
3.60 
3.50 
3.40 
3.30 
3.15 
3.00 
3.00 
2.90 
2.80 
2.75 
2.70 
2.60 
2.50 
2.50 
2.45 
2.30 
2.25 
2.15 
2.10 
2.10 
2.05 
2.00 
2.00 
1.90 
1.95 
2.05 
2.20 
2.10 
2.00 
1.90 
1.85 
1.80 
1.90 
1.75 
1.75 
1.70 
1.70 
1.80 
1.85 
1.90 
1.90 
1.90 
1.80 
1.80 
1.95 
2.00 
2.10 
2.10 
2.00 
1.80 
1.80 
1.75 
1.80 
1.80 
1.75 
1.70 
1.70 
1.65 
1.65 
1.70 
1.75 
1.75 
1.75 
1.80 
1.80 
1.85 
1.85 
1.80 
1.75 
1.70 
1.65 
1.60 
1.80 
1.80 
1.75 
1.80 
1.80 
1.85 
1.85 
1.80 
1.70 
1.70 
1.70 
1.65 
1.60 
1.60 
1.60 
1.55 
1.55 
1.50 
1.50 
1.50 
1.60 
1.70 
1.65 
1.65 
1.60 
1.60 
1.60 
1.55 
1.60 
1.60 
1.65 
1.70 
1.75 
1.70 
1.75 
1.70 
1.70 
1.70 
"i.'65 
"i. 60 
1. 60* 
1.55 
"'i.'6o' 
" 1.55 
'"i.'eo" 
"i.55" 
"i.55 
*"i."6o" 
"'i.'eo' 
"i.55 
1.60 
1.55 
1.85 
2 
3 
1.55 
1.50 
4... 
5 
1.50 
2.00 
6 
7 
1.45 
2.20 
8 
9 
1.45 
2.55 
10 .. 
11 
1.50 
2.60 
12 
13 
1.55 
2.50 
14... 
15 
1.60 
2.50 
16 .. 
17 
1.60 
2.50 
18 
19 
1.55 
2.55 
20 
21 
1.60 
2.50 
22 
23 
1.65 
2.55 
24 
25 
2.00 
2.70 
• 26... 
27 
2.10 
2.80 
28 
29 
2.05 
2.75 
30. . 
31 
2.70 
