A Treatise of Mathematical Instruments, including most of the instruments employed in Drawing; for assisting the vision; in Surveying and Levelling, in practical Astronomy and for measuring the Angles of CrystalsJohn Weale, 1849 - 183 pages |
Other editions - View all
A Treatise On Mathematical Instruments: Including Most of the Instruments ... John Fry Heather No preview available - 2018 |
A Treatise on Mathematical Instruments: Including Most of the Instruments ... John Fry Heather No preview available - 2015 |
A Treatise on Mathematical Instruments: Including Most of the Instruments ... John Fry Heather No preview available - 2016 |
Common terms and phrases
accuracy achromatic adjustment altitude axis azimuth beam compasses bisected breadth bubble called chain chromatic dispersion clamp coincide colatitude compasses construction correction cross wires described diaphragm distinct vision divided drawing edge extent will reach eye-piece feet figure focal length given number graduated Gunter's chain half horizontal inches index glass instru instrument intersection latitude lens lenses limb line of chords line of collimation line of numbers line of sines logarithmic marked means measured ment meridian microscope number of degrees object object-glass observed paper parallax pass pencil of light perpendicular placed plane position primary divisions prism protractor quarter girt radius rays reading reflected image reflector refracting Refracting Telescope represent right ascension round secants sector sextant side slider sliding speculum spherical aberration spirit level square station strument subdivisions taken tangents telescope theodolite tion transverse distance tube turning vernier plate vernier scale vertical circle zero