Farm Development: An Introductory Book in Agriculture, Including a Discussion of Soils, Selecting & Planning Farms, Subduing the Fields, Drainage, Irrigation, Roads, Fences, Together with Introductory Chapters Concerning Farm Business, and the Relations of General Science to AgricultureOrange Judd Company, 1910 - 391 páginas |
Dentro del libro
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Página vii
... instrument made of mason's spirit level . 159 60 Mason's level on tripod with sights . 160 61 Homemade leveling instrument . 161 62 Band chain of steel .. 162 63 Surveyor's chain folded . 163 64 Surveyor's chain partly folded . 163 65 ...
... instrument made of mason's spirit level . 159 60 Mason's level on tripod with sights . 160 61 Homemade leveling instrument . 161 62 Band chain of steel .. 162 63 Surveyor's chain folded . 163 64 Surveyor's chain partly folded . 163 65 ...
Página 4
... instruments of precision , trains the student's eye so that he sees and appreciates many things on the farm which previously had little or no meaning . The daily routine of class work , of note and essay writing , of searching for refer ...
... instruments of precision , trains the student's eye so that he sees and appreciates many things on the farm which previously had little or no meaning . The daily routine of class work , of note and essay writing , of searching for refer ...
Página 156
... instruments for measuring and leveling are not necessary . The farmer's knowledge of the land , or even a " bird's - eye bird's - eye " survey may be sufficient . In other cases , the system may be very extensive , the grade very slight ...
... instruments for measuring and leveling are not necessary . The farmer's knowledge of the land , or even a " bird's - eye bird's - eye " survey may be sufficient . In other cases , the system may be very extensive , the grade very slight ...
Página 157
... ability to deal with the parties interested in co - operative drainage , and this is quite as much needed in the enterprise as his technical knowledge . Surveying instruments . - In planning drainage requir- ing the DRAINAGE 157.
... ability to deal with the parties interested in co - operative drainage , and this is quite as much needed in the enterprise as his technical knowledge . Surveying instruments . - In planning drainage requir- ing the DRAINAGE 157.
Página 158
... instrument is mounted on a tripod and the operator spreads the legs 3 feet apart , more or less , to bring the telescope even with his eye when slightly stooping . The tripod should be so adjusted that the plate A is in a nearly ...
... instrument is mounted on a tripod and the operator spreads the legs 3 feet apart , more or less , to bring the telescope even with his eye when slightly stooping . The tripod should be so adjusted that the plate A is in a nearly ...
Otras ediciones - Ver todas
Farm Development; An Introductory Book in Agriculture, Including a ... W. M. Hays Sin vista previa disponible - 2017 |
Términos y frases comunes
acre agricultural amount of water animals better biped bottom brace building canal capillary capillary action capstan carry cement cents clay construction corn corner post cost crop rotation crops cubic yard cultivation culverts datum deep depth drain tiles drainage earth engine expense farm home farmers farmstead feet fence fields flood water flow Fresno scraper furrow-slice furrows gate glacial glacier grade grain Grass gravel ground water height Illustrated inches instrument irrigation labor lake Lake Agassiz layer low area macadam material mile Minnesota Minnesota river Mississippi river mixed moisture necessary open ditch outlet particles peat plow practical profitable rain rainfall reversible road machine river road roller roadway rock roots rotation rural sand schools showing shown in Figure side soil spade station stone stream stumps subsoil tile drains tion tivated trees wagon wheat wire fence