Gurley Manual of Surveying Instruments ...W. & L. E. Gurley, 1878 |
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12 inches long Achromatic adjustment axis Beam Compass Bow Pen Boxwood brass Bridges bubble centre chain clamp and tangent clamp screw Cloth compass circle Construction Curves declination arc described Drawing Pen edge edition engraving equatorial lines eye-piece feet furnished German Silver glass graduated half degrees horizontal Illustrated inch needle inches diameter inches wide instru Iron latitude Lengthening Bar lens leveling instrument leveling screws limb line of collimation magnetic main socket ment meridian morocco moved Needle Point object object-glass ordinary pair Pen and Pencil Pencil Points plain Dividers Plano-Convex Lens plate plumb-bob position Price Protractor Railway reading refraction ring shown side sights socket solar attachment Solar Compass spindle SPIRIT LEVELS STRAIGHT EDGES Strength of Materials sun's image surface Surveying surveyor Surveyor's Transit tangent movement tangent screw telescope tripod TROY tube turned Vernier Compass Vernier Transit vertical Weale's series wires wood zero
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