Mathematical Instruments: Their Construction, Adjustment, Testing and Use : Comprising Drawing, Measuring, Optical, Surveying, and Astronomical InstrumentsCrosby, Lockwood and Company, 1884 - 159 стор. |
Загальні терміни та фрази
adjustment altitude axis barometer beam compasses bisected centre chords chromatic dispersion circle clamp cloth coincident collimation compasses construction cross wires D line decimal point described diameter difference distinct vision divided divisor drawing Dumpy level edge Edition ENGINEERING equal extent will reach eye-piece feet focal length gauge point given number glass groove horizontal inches instru instrument integral figures integral places latitude lens lenses light limb line of sines logarithmic marked means measured ment mercury meridian microscope mirror number of integral object object-glass object-piece observed parallax parallel plate pencil plane position primary divisions prism produced proportional protractor radius rays reading reflected reflector represent right angles right ascension round rule scale screw side slide slide-rule spherical aberration spirit level station straight edge surface taken tangents telescope term theodolite tion transverse distance triangle tube turned vernier vertical zero
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