824 
DISCUSSION : FORESTS, RESERVOIRS, AND STREAM FLOW 
Mr, Roberts. TABLE 2.—Yerarty Mean Numeper or Days tar Onto River at Pirts- 
BURG REACHED THE INDICATED STaGES IN THE PERIOD SHOWN. 
ele ie @ le ele le ls ¢ fé fe 2 |é 
‘4 Lal al Ge ed = : 
Bue jp je pe le ly 2 9 Re Solr el tele! = 
Ex: Cole gl i dled i oli gli cls alt LO) EOP LO) boi ac 
Years. SLE bole Boles bola ood Bola weiss tole eel a Be le le lS 
Set EE ee Cees ges Sasaeuan: & 
a8 2 BBG ES & Bi id |e le |e i? 
a | ja ie 418 lg 18 8 
1855-1880....... 00... eeeee 0.4] 2.9|12.1/39.9|42.9/45.1]46.8)44.0/42.0,31.4 32.9/17.1| 6.8] 0.7) 0.8 
1881-1907, 11] 114]20!0/40'4 48,4} 48.6 41 -2/86.0)81.6)26.1/82.7 29.5/18.9 8.2 1.5, 0.8 
I 
Note for Table 2.—Some confusion in stages below 8 ft. since 1885—upon completion of 
the first dam in the Ohio—has resulted from attempts to’conform the readings below the 
dam to the old Pittsburg datum; hence too much importance should not be attached to 
differences shown in the table for periods when the river was below 3 ft. 
TABLE 8.—Mean Montuty Hicuest Staces, IN “Fret. 
Jan. Bob, | ar. Apr. | May.) June.| July.| Aug. | Sept. } Oct. | Nov.| Dec. 
1855-1880 14,71] 13.99) 16.02) 15.85) 12.00) 8.65) 7.26] 7.13) 7.44) 6.91) 10.85, 14,97 
1881-1907... 17,07] 16.76| 18.26] 15.45] 11.44] 10.52] 9.18] 7.80| 5.71] 6.75 TO 13.66 
Note for Table 3.—But for a remarkable flood, reaching 31 ft. in September, 1861, the 
means of the two periods for that month would have been much the same. 
TABLE 4.—Mran Monruty Lowest Sraces, In Feet. 
i f 
Jan. | Feb. Mar.| Apr. | May. |June. auatg.| Ane: Sept., Oct. | Nov. | Dec. 
1855-1880........ 3.52 | 3.72 | 5.14 | 5.08 | 3.75 | 2.52 | 2.08 | 1.74 | 1.20 | 1.47 | 2.69 | 3.62 
1881-1907. 0... 4.42 | 5.06 | 5.98 | 5.64 4.81 | 5.50 2.61 | 2.04 | 1.75 | 2.08 | 8.07 | 4.15 
i l 
TABLE 5. 
Jan. | Fes. |Mar.| Apr.| Nov.| Dec.| May. | Jun. Juty.| Ave. Sept.) Oor 
Period. . . * . . : . . . " 1 ah alll aelveeal == 
He ee alee lage |s|ejepa ee s/s e]/e) es) 4, 4/8 
Bead and id ad id ed hd RIS RSS SR PR SRS R SQ Ax 
First Falla ENelteleclelia ae 
cisssisey, { [18] 4 | 15] 4 fee] 5 lat] 8} 5) 118] 5 ey 6/ 1/0} 0]1/1) 4)2,1]0 
= _ —|- 
caeeeto07). {29 ]1t a7 jus a0 liz fav |e} 2}aifels}1jel1)4)1}efalafo ato 
j 
1 
