OCR Text |
Show I''' FARM SURVEYS, ' How m Straight-Edge Board and Spirit Level Can Be Used. P A means of surveying for tho farmor B without Investment In any oxpcnslvo W equlpmont has bcon offered by n cor- I respondent. This can bo readily prac- K tlced by nny ono, and requtros only a board with a straight edge and a spirit J' lovol. Tho way to go about It Is this: F f. First determlno tho only two points, f tho levels of which you deslro to do- I, ' , ' termlno.nnddrivostakcs In tho ground. Thon take a board with an oven odgo i and tack It to a trco, If ono happens to E, bo nvallablo within tho lino of tho two R stakes. Otherwise drlvo a third stnko r. In tbo ground between thorn. Put tho I' board at such n. tjelRht that you can K readily sight over It, and carefully level this board by moans of tho spirit fc level. Thon sight ovor It toward ono F of tho stakes, having somo ono at that I stake who will by moans of n small pleco of paper locuto tho point at i which your lino of vltlon cuts It In I,1 other words, whero a lino projected t from your sighting board would strlko j the stake. Mako somo sort of a mark f at this point, and then sight to tlio oth- I. er stnko In tlio samo way, and mark I tho point whero tho lino would strlko p" It. ny measuring distances that theso two points are abovo tho ground you can get the difference tn lovola with 51 reasonable accuracy, says tho Journal i of Agriculture For Instnnco, If your 6' lino of vision has cut ono stake eight I feet from tho ground, and tho othor I ono Ave feet from tho ground, thon ob- i C vlously tho dlffcrenco In lovol Is throo t feet, or, lu other words, tho vicinity of l tho stake on which tho. mnrk Is flvo V- feet from tho ground Is thrco feot IK,- ' higher than tha othor stake, and you ;., will have a thtoo foot fall from drain- " Ing from this point to tho othor. |