Annual ReportThe Board, 1892 |
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Seite 173
... reservoir easy and cheap , and the loss by evaporation and seepage may be reduced to a minimum , yet if the clouds do not yield copious showers the reservoir will not be filled . The reports of Prof. G. D. Swezey , direc- tor of Boswell ...
... reservoir easy and cheap , and the loss by evaporation and seepage may be reduced to a minimum , yet if the clouds do not yield copious showers the reservoir will not be filled . The reports of Prof. G. D. Swezey , direc- tor of Boswell ...
Seite 174
... reservoirs . The general slope of the surface is not less important than the existence of depressions . A slight depression in a level plain may be converted into a reservoir , if other conditions are favorable , while the same ...
... reservoirs . The general slope of the surface is not less important than the existence of depressions . A slight depression in a level plain may be converted into a reservoir , if other conditions are favorable , while the same ...
Seite 175
... reservoir . An ideal figure would be a circle broken only at one point where a short dam would serve to complete the ... reservoir fed from ten times its own area to two feet . Evaporation alone will more than dispose of the remainder ...
... reservoir . An ideal figure would be a circle broken only at one point where a short dam would serve to complete the ... reservoir fed from ten times its own area to two feet . Evaporation alone will more than dispose of the remainder ...
Seite 176
... reservoir must be considerably enlarged . How much enlargement is necessary will appear from the tables on a subsequent page . 4. SEEPAGE . This is another varying factor which is liable to defeat all plans which ignore its existence ...
... reservoir must be considerably enlarged . How much enlargement is necessary will appear from the tables on a subsequent page . 4. SEEPAGE . This is another varying factor which is liable to defeat all plans which ignore its existence ...
Seite 177
... RESERVOIR FOR A RATIO OF RESERVOIR TO ITS CATCHMENT BASIN . RAINFALL OF 18 Inches . 24 Inches . 30 Inches . Feet . Feet . Feet . 1:30 0 1 2.5 1:40 1 3 5 1:50 2.5 5 7.5 1:60 4 7 10 1:70 1:80 5.5 7 9 12.5 11 15 By inspecting this table ...
... RESERVOIR FOR A RATIO OF RESERVOIR TO ITS CATCHMENT BASIN . RAINFALL OF 18 Inches . 24 Inches . 30 Inches . Feet . Feet . Feet . 1:30 0 1 2.5 1:40 1 3 5 1:50 2.5 5 7.5 1:60 4 7 10 1:70 1:80 5.5 7 9 12.5 11 15 By inspecting this table ...
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Häufige Begriffe und Wortgruppen
00 Sept acre anteriorly April average beetle beets blotches Board of Agriculture body brown cent Chinch-bug corn COUNTY-Continued Creek precinct crop cultivation cut-worms Desprez direction of wind Dorsal rows dorsal scales eastern Nebraska eggs feet Furnas grain Grand Island Grass ground color Hall county Hay Springs Highest temperature inches injury insect irrigation larva larvæ Lincoln loam Loup Lowest temperature Mean temperature median dorsal month moth Nebraska Nemaha Nemaha counties Number cloudless days Number cloudy days Number partly cloudy NW NW occipitals Organized since 1880 perature plants plats Platte posterior posteriorly Postoculars Prairie Precipitation Premiums Preoculars Prevailing direction pupa rainfall Rainy days Red Willow county reservoir Riley rows of scales Sandy loam seed Sheridan counties Snake species specimens spots spring stripe subcaudal sugar supraoculars tail townships since 1880 Upper labials usually ventral plates village Wanzlebener Ward Worm yellow young
Beliebte Passagen
Seite 267 - ... skeleton' leaf. As they grow older, however, they devour all portions of the leaf, and often eat also the petioles and tender stems. Opportunity has not been given to determine the exact length of the larval life of this insect, but judging from observations made, this cannot greatly exceed a week. Parties living in the region where the insect was present in great numbers give ten days as the length of the time in which the chief destruction was accomplished.
Seite 354 - Two lateral rows of scales smooth ; first, second, and third gradually increasing in size. Scales more linear than in C. atrox. General color yellowish brown, with a series of subquadrate dark blotches, with the corners rounded and the anterior and posterior sides frequently concave, the exterior convex. These blotches are ten or eleven scales wide and four or five long, lighter in the centre, and margined for one-third of a scale with light yellowish. The intervals along the back light brown, darker...
Seite 257 - The hind wings are yellowish gray, with a central dusky spot, behind which are two faint, dusky bands. The head and thorax are rust-red, with an elevated tawny tuft on each. The abdomen is pale brown, with a row of tawny tufts on the back. The wings expand nearly one inch and a half.
Seite 337 - Abdominal scutellae from 200 to 235 ; posterior bifid. Subcaudals all bifid. Color brown or black, in quadrate blotches on the back and on the sides, separated by lighter intervals. Abdomen usually coarsely blotched with darker. In one species dark stripes on a light ground. Although very large and powerful, many of the species of the genus are characterized by their extreme gentleness, rarely becoming enraged, even when provoked.
Seite 276 - ... the second week of June, while in the latitude of Washington it is seen about two weeks earlier. It appears suddenly in great numbers, as has often been observed and commented upon, but this is in conformity with the habits of other Lamellicorn beetles, eg, our common May-beetles (Lachnosterna), and this habit is still more marked in certain species of Hoplia and Serica.
Seite 190 - After taking a reading the observer will remove the pin to the left, and then take hold of the thermometer, about three inches from the top, and spin it around several times, or until the top of the column is brought down to the temperature of the air at the time of observation. Care must be taken not to...
Seite 175 - Bull. 5 3 dissipated as where the winds are checked. Hence the value of the windbreak which reduces both the evaporation from the soil and the transpiration from the plant, for transpiration is also accelerated by the motion of the plant under the influence of wind.
Seite 278 - These last are at first white, and all the parts soft as the pupa, and they frequently remain in the earth for weeks at a time, until thoroughly hardened, and then, on some favorable night in May, they rise in swarms and fill the air.
Seite 353 - ... manner that the apex of the tooth describes the arc of a circle, and finally points downward instead of backward. This protrusion of the fang is not an automatic motion, consequent upon mere opening of the mouth, as formerly supposed, but a volitional act, as the reverse motion, namely, the folding back of the tooth, also is ; so that, in simply feeding, the fangs are not erected.
Seite 5 - Crosse, then offered the following resolution, which was adopted: "Resolved, That, it is the sense of this...