Bismarck daily tribune. [volume] (Bismarck, Dakota [N.D.]) 1881-1916, 1905-06-12
which is readily capable Of adjustment
", The f1oyv IN any rasf, Is hsIs

WHICH Is 4Teallly Capable OF aQJuStment
to the flow In any case. II rs s.s
a simple form Of this device and its
use is described ais follows: Take q
board inch thick, IL inches wide,
and about 5 feet long. The opening
is / inch wide and SO inches long, and
the distance from the top of the board
to the center of the opening is exact
" 4 inches on the upstream side. On
the downstream side the opening is
beveled SO that the hole presents
sharp edges to the stream. A sliding
board is hung upon the top of the first
board with a strip screwed along its
upper edge, this sliding board being
wide enough to cover the opening on
the upstream side. In the slot there
is a closely fitting block made to slide
on the beveled edges, and fastened by
a screw to the sliding boardH It is
obvious, then, that when the sliding
board Is moved backward or forward,
by means of it's end, which is extend
ed for a handle, the block moves in
the slot and determines the length Of
the opening. E. ...-
In operation the board is placed in
the stream so as to dam the flow COM
pletely, and the sliding board Is moved
backward or forward until the water
Is all passing through the slot, the
water being kept up to the top Of the
board. or 4 inches above the center Of
the opening. The length of the open
ing measures the number of miners
inches of water flowing through. If
the flow is too great to pass through
the opening 1 inch wide the opening
may be made wider, the water still to
be kept inches above the center of
the opening. The number of miners
inches then discharged is equal to the
number Of square inches in the OPEN
ing. The assumption made that the
discharge is proportional to the size
OF the opening is not true, but the
error in measuring small quantities is
not great enough to be taken into con-
sideration. BY converting the results
of measurements in miners inches to
gallons, cubic feet, or some other
familiar unit, it may be determined
how long it will take the stream to
fill reservoir or cover a given field
with the necessary depth of water.
This unit is readily convertible into
cubic feet or gallons or acre-inches of
water, according to the time the water
flows.
The following data will be helpful
IN computations: One miners inch. as
described above, equals O.1496 gallon
per second; 1916 gallons per minute;
53S.56 gallons per hour; 12,925.44 gal
Ions per day; 0.O2 cubic foot per Sec
ond; IL cubic feet per minute: 70
cubic feet per hour. One acre-inch of
water Chat is, 1 inch in depth over
an acre of surface) equals 27;152 gal
Ions, Or $500 cubic feet, and 1 miners
inch will supply this quantity in about
5o.4 hours. Thus simple calculation
shows that little stream of miners
inches will supply enough water to
cover an acre 2.3 inches deep in about
70 hours-a fair amount for one irri-
cation OF soil of average character if it
has not been allowed to become too
dry before the application; in fact,
this Is an average amount actually
used for an irrigation of shallow
rooted plants like most field and gar
den crops.
Sources of Water Supply and Their
Use.
The sources of water supply and
methods of use most frequently avail
able for single farm include the fol-
lowing: Diversion of perennial
streams. dava1annoent IN dr,, .4.