. Bell telephone magazine . 4 Fig. 12. A bull-dozer eased offthe sharp drop ofthe ditch banks inpreparation for asquare crossing ofthis road. Roadsurface and shoul-ders and ditch banksare always restoredto their original con-dition. Plowing Cables into the Ground I phone Laboratories may be used (Fig-ure 8). This device, which is pri-marily for locating cables, can be usedalso in exploring for buried pipes. Itis so accurate that an undergroundcable can be located within less thanan inch both laterally and in depth be-low the surface. Through use of the information ac-cumulated by the methods d
. Bell telephone magazine . 4 Fig. 12. A bull-dozer eased offthe sharp drop ofthe ditch banks inpreparation for asquare crossing ofthis road. Roadsurface and shoul-ders and ditch banksare always restoredto their original con-dition. Plowing Cables into the Ground I phone Laboratories may be used (Fig-ure 8). This device, which is pri-marily for locating cables, can be usedalso in exploring for buried pipes. Itis so accurate that an undergroundcable can be located within less thanan inch both laterally and in depth be-low the surface. Through use of the information ac-cumulated by the methods discussed,the line of the proposed buried cablecan now be staked out in readinessfor the work crews. Buried boulders,ditches, and other obstacles interferewith the cable-plowing preparatory work can bedone to prevent delays to the rootingand cable-plowing crews helps tokeep the train moving. Preparing the Roadivay for thePlow Train One of the first jobs to be done inopening up the cross-country roadwayis to build gates in all the fences en-countered. These are necessary forfuture maintenance as well as for thepassage of the cable-laying train. At sharp ravines, road ditches, andstream banks, a roadway is ma
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Keywords: ., bookauthoramerican, bookcentury1900, bookdecade1920, bookyear1922
