Surveying e-bog

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The Level Bubble - Locke's i-iand-cel - Abney hand-level and Clinometer - Leveling tods (target, self-reading) - New York, Bos ton, and Philadelphia Rods - cross-section Rod - Ranging Poles Wye Level (four-screw and Three - Screw) - Line of Collimation Instrumental Parallax - Spherical Aberration - Chromatic Aberration - Adjustments of We Level - Adjustment of Axis of bubble-tube Adjustment of Vertical Axis - Replacing the cross-hairs - The Dumpy Level - Adjustments of Dumpy Level - Peg Method of Adjustment Precise Spirit Level - Gurley Binocular and Monocular hand-levels and Adjustments - Setting Up the Level - Care of the Instrument Problems in Leveling - Profile Leveling - cross-sectioning - S'lope Stakes.