Surveying ; a manual of practical instruction in the art of plane surveying, including plotting, leveling, triangulation, line running, cross-sectioning, traversing, and other details of field work (1910)
American School of Correspondence, Phillips, Alfred Edward, 1863- [from old catalog] · Chicago, American school of correspondence · leaf 35
represents a vernier as aj)plied to an engineers transit. 11 will be noticed that the , . ,. -I I Fig. 20. main scale is divuietl so as to read directly to ;50 minutes. The vernier is so divided that 2.» spaces n|)()n the main scale equal 80 spaces upon the vernier, therefore tlie least count of… … L \ Qiriiiii([iri/iiifB iiiliiiii^iiiil iiiiiiii TTl Iifj. -n. It will he a;>]iarent, therefore, that the readings are takenin the direction of the increasing graduations of the main scale.Thus, for e.xaniple, in Fig. 28, it will be noted that the zero </, PLANE SUliVEYlNG 25 has passed the…
Surveying
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