Pngc 



Parallax - . 64 



Sun's. ... . 161, 172 



IV- Method . 5. 13. U. 19 



rianchette ..... 45 



Plane Table ..... 38 



Plate Hubbies . .60, 64 



Platinum Wires . 144 



i'risms 



Eyepiece . . . . . igi 



Wollaston .... 193 



Abbe - Aruici .... 194 



i )hjective . . . .192 



Penta . 194-196 



Quick Leveling Head . . . 197 



Reading Mirror . . . . 13,15,17.23 



Reciprocal Leveling . -37 



Refraction . . 35. 165, 170 



Resolving Power . . 78 



Reversion Bubble . . 14, 70, 93 



Short Focus Lens . . . .189 



Signal Code . . . . . 26, 138 



Slope Stake Setting . . 183 



Solar Attachment (Saegmuller) . . . 157 



Adjustments ... 162 



Solar Meridian .... 151 



Solar Screen (Davis) . . 152 



Spherical Aberration 81 



Stadia: ..... 103-106 



Adjustable . . .107 



Disappearing .... 109 



Reduction Tables . . . . m 



Stepping Method . . . 112 



Beaman's Arc . . . .113 



Stadiagraph (Averill) . . . 117 



Prismatic Telescope . . . 118 



Anallatic Telescope 119 



Steinheil Heliotrope . . . .135 



Striding Level . . . 14, 53, 55, 131 



Three Screw Base . . .18, 139 



Time Determination .... 169, 171 



Transit: ..... 59 



Specifications .... 74-75 



Standards . .60, 130 



Tripods . 62 



Tachymeter: ..... 77 



Telescope Bubble . . 6y, 9-' 



Colored Figures . . . . 101 



Specifications . . . u6-ij/ 



Standards ..... i.v 



Theodolite: .... 128 



Axis Bearings . . 77, i~'y, '3' 



Specifications . . 150 



Trip' 



Mensula . . . n 



Johnson .... 42 



Trrtvrrsr ..... 43 



Transit . . .62 



Extension ... 197 



Tunnel Trivet . . 176 



Variable Power Eyepiece . . 82 



Variation Plate ..... 90 



Vernier . . - 96-101 



Waterproof Construction . . 101 



