Farm drainage: The Principles, Processes, and Effects of Draining Land with Stones, Wood, Plows, and Open Ditches, and Especially with TilesFrench, Henry F. (Henry Flagg)
Science
Farm drainage: The Principles, Processes, and Effects of Draining Land with Stones, Wood, Plows, and Open Ditches, and Especially with Tiles
French, Henry F. (Henry Flagg)
Drainage
Temperature at Albany at two feet depth.
" " " highest August 17 and 18, 70 deg.
" " " lowest February 28, 32-3/4 deg.
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" " " Range, 37-1/4 deg.
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" " " at four feet depth.
" " " highest July 29, 64-1/2 deg.
" " " lowest February 25, 35-1/2 deg.
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" " " Range, 29 deg.
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" " " of the air, February 12, -3 deg.
" " " " " August, 3, P. M., 90 deg.
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" " " Range, 93 deg.
Temperature at Scott at two feet depth.
" " " highest, August 17 and 18, 64 deg.
" " " at four ft. depth, 17 days in Aug. 60 deg.
" " " of the air, at 3, P. M., highest 90 deg.
The temperature of falling rain, however, in the hot season, is many
degrees cooler than the lower stratum of the atmosphere, and the surface
of the earth upon which it falls. The effects of rain on drained soil,
in the heat of Summer, are, then, two-fold; to cool the burning surface,
which is, as we have seen, much warmer than the rain, and, at the same
time, to warm the subsoil which is cooler than the rain itself, as it
falls, and very much cooler than the rain-water, as it is warmed by its
passage through the hot surface soil. These are beautiful provisions of
Nature, by which the excesses of heat and cold are mitigated, and the
temperature of the soil rendered more uniform, upon land adapted, by
drainage, to her genial influences.
Upon the saturated and water-logged bog, as we have seen, the effect of
the greatest heat is insufficient to raise the temperature of the
subsoil a single degree, while the surface may be burned up and
"shrivelled like a parched scroll."
Public-domain text, read in full here on John Shaqi.
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