Box 22, Folder 11: Water Levels-Various Data, 1865-1873

24

Rules-Data &c

To ascertain the power applied multiply the weight of water expanded by the height of the head above the bottom of the wheel. Jour. Fr. Inst 6 p. 147

To show the effect, multiply the weight raised by the distance through which it is raised. Ibid.

A cubic foot of water weighs 62 1/2 pounds.

Friction must be allowed for.

If a wheel with 14 ft height of head with 100 cubic feet of water pr minute has a power of

[Table of Data]

This table will show the relative value of water under different heads.

The effect is 75 to 80 pr ct. of the above.

215

Vocabulary

Forebay-Water above-say between the canal & the gate. Carts, the ends of the wheel. Head & Fall-Head above aperture-Fall below to bottom of wheel. Gudgeon-the "journals" on which water wheels turn Plummer, the socket in which the gudgeon turns

26.

[Sketches and calculations]

The maximum velocity or axis of a river when high is 0.35 of its depth below the surface; when low 0.15 of its depth. The curve of velocity at different depths is a parabola. Humphrey & Abbot

d=(0.317 + 0.06f)r

d,=Depth below surface of max, on velocity f=force of wind (0 being calm 10 a hurricane &c)-if down + if upstream r=mean radius (or area divided by the wetted perometer)

Example If a canal 4 ft deep 40 ft wide on suface [sketch] 26 feet on bottom, wind up stream with a force of 3, required the depth of the axis of max. vel.

[calculations].

27

Table showing the mean monthly level of the Milwaukee river above the city zero of grades, which is the level of the river in March 1836*; also the depth below surface of water in the canal.

[Data Table].

*Except below the high water of 1838

Red figures for observations made on L. Erie-Whittleseys Memoir

28

Table of Mean Monthly level of the Milwaukee river-Continued

[Table of Data]