ENPages
p. 96
Evaportation, daily means. Continued from p 75 93.
[Table].
p. 97
Table showing the amount of Evaporation. in Inches, Obtained by multiplying the daily mean by the number of days in each month.
[Data Table].
p. 98
35
The average amount of earthy matter in plants is about 5 pr ct. or 1 pound in every 20 This is all obtained from matter dissolved in winter and the average amount of earthy matter in spring river & lake waters is about 8 grains in a gallon of 58,318 grains or 1 in 7290
Hence to obtain 20 pounds of wood or other vegetable matter 7290 pounds of water must be evaporated from the surface of the leaves, having been drawn from the earth through the roots, and stems; this is 1 for 365.
About 6000 pounds of vegetable matter grows annually on an acre of land-equivalent to 3 tons of hay-or one cord of wood &c.
Now 6000 x 265 = 2,190,000 which is the number of pounds of water absorbed by plants and returned to the atmosphere from one acre in one year.
[Calculations and Measurements]
Quantity of water absorbed by plants in the basin of the Milwaukee river, being 32 pr ct or nearly one third of the whole amount of rain fall!
Consumed by plants Drained off by river Evaporated from surface & other wire command?
(See pp 79 & 80)
[Calculations].
p. 100
July 23d 1867-Men are at work rebuilding the east end of the dam. The water is so low that it runs up=stream through the break in the dam when the lake is rising.
Measured the flow of water at a point a little above the remains of the old saw mill dam of 1836
[Calculations and Measurements]
Showing that the Milwaukee river is reduced to a small stream! in this dry time it is 4,011,904,900 cubic ft in 1 year.
equal to a rain fall of 2 1/2 inches on the 682 miles drainage area.
