A Manual of the Principal Instruments Used in American Engineering and Surveying |
Common terms and phrases
adjusting socket axis Beam Compass Bow Pen Boxwood brass centre cents chain clamp and tangent clamp screw compass circle convex lens declination arc described direction Drawing Pen edge Engineer's Transit Engineers engraving equatorial lines eye-piece feet German Silver glass graduated half degrees inches diameter inches drawn inches long inches shut instru jacob staff lengthening bar lens leveling instrument leveling screws limb line of collimation main socket ment morocco moved needle point object object-glass observation optical axis ordinary Parallel Ruler pen and pencil pencil points pinion Plain Compass plain Dividers plumb-bob position precisely Price Protractor Railroad Compass revolve right angles ring Rosewood shown side sights solar apparatus Solar Compass SPIRIT LEVELS spring steel Strength of Materials sun's image surface Surveying surveyor Surveyor's Transit tangent movement tangent screw telescope Theodolite tion tripod head TROY tube variation Vernier Compass Vernier Transit wyes zero