Treatise on Mathematical Instruments: Their Construction, Adjustment, Testing and Use Concisely ExplainedVirtue Bros. & Company, 1866 - 185 pages |
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Page 2
... position represented by the dotted lines , which it would have when screwed tight up . Fig . 3 represents a key , of which the two points fit into the two holes seen in the nut , n , of the joint ; and by turning this nut the joint is ...
... position represented by the dotted lines , which it would have when screwed tight up . Fig . 3 represents a key , of which the two points fit into the two holes seen in the nut , n , of the joint ; and by turning this nut the joint is ...
Page 17
... position of every point being deter- mined by the intersection of its given meridian and parallel of latitude . The plane upon which the circles are to be delineated is called the primitive , and the circumference of a circle , de ...
... position of every point being deter- mined by the intersection of its given meridian and parallel of latitude . The plane upon which the circles are to be delineated is called the primitive , and the circumference of a circle , de ...
Page 19
... positions , but so that the point c may always be upon the line w E , and the point B upon the line N s , and the point p will , in every such position , coin- cide with a point in the required ellipse . W. 45 GO 90 30 Describe , then ...
... positions , but so that the point c may always be upon the line w E , and the point B upon the line N s , and the point p will , in every such position , coin- cide with a point in the required ellipse . W. 45 GO 90 30 Describe , then ...
Page 39
... position of the third point in the copy . In the same manner all the other points of the reduced copy may be set off , each one from two points previously laid down . LINE OF CHORDS The double scales of chords upon the sector are more ...
... position of the third point in the copy . In the same manner all the other points of the reduced copy may be set off , each one from two points previously laid down . LINE OF CHORDS The double scales of chords upon the sector are more ...
Page 43
... the division or subdivision corresponding to the number of divisions or subdivisions of the natural scale , which measures the given distance ; and the line drawn along the sloped edge in its new position will be MARQUOIS S SCALES 43.
... the division or subdivision corresponding to the number of divisions or subdivisions of the natural scale , which measures the given distance ; and the line drawn along the sloped edge in its new position will be MARQUOIS S SCALES 43.
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Treatise on Mathematical Instruments: Their Construction, Adjustment ... John Fry Heather No preview available - 2016 |
Common terms and phrases
accuracy achromatic adjustment altitude axis azimuth beam compasses bisected breadth bubble called chromatic dispersion clamp coincide colatitude compasses construction correct cross wires described diaphragm distinct vision Ditto ditto divided drawing edge equal error extent will reach eye-piece feet figure fixed focal length given number goniometer graduated half horizontal inches index glass instru instrument intersection IVY LANE latitude lens lenses limb line of collimation line of numbers line of sines logarithmic means measured ment meridian microscope number of degrees object-glass observed paper parallax perpendicular placed plane position primary divisions prism protractor quarter girt radius rays reading reflected image reflector refracting refracting telescopes represent right angles right ascension round secants sector sextant side Slide Rule sliding speculum spherical aberration spirit level square staff station subdivisions tangents telescope theodolite transit transverse distance triangle tube turning vernier scale vertical circle zero
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