Treatise on Mathematical Instruments: Their Construction, Adjustment, Testing and Use Concisely ExplainedVirtue Bros. & Company, 1866 - 185 pages |
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... third , of Surveying Instruments ; the fourth , of Astronomical Instruments , and the fifth , and last , of Goniometrical Instruments , for measuring the angles of crystals . The greater part of the Wood Engravings , and some parts of ...
... third , of Surveying Instruments ; the fourth , of Astronomical Instruments , and the fifth , and last , of Goniometrical Instruments , for measuring the angles of crystals . The greater part of the Wood Engravings , and some parts of ...
Page 7
... third made to coincide with a new point of the drawing , that is , one not yet copied : then , by placing the two first points on the corresponding points in the copy , the third point of the compasses will transfer the new point to the ...
... third made to coincide with a new point of the drawing , that is , one not yet copied : then , by placing the two first points on the corresponding points in the copy , the third point of the compasses will transfer the new point to the ...
Page 8
... third edge , and try it in the same manner with each of the other two , and if in each case the contact be close throughout the whole extent of the edges , then they are all three good * . " To draw a straight line between two points ...
... third edge , and try it in the same manner with each of the other two , and if in each case the contact be close throughout the whole extent of the edges , then they are all three good * . " To draw a straight line between two points ...
Page 11
... third vertical . Now , since the first of the parallels , of the diagonals , and of the verticals indicate the zero points for the third , second , and first figures respectively , the second of each of them stands for , and is marked ...
... third vertical . Now , since the first of the parallels , of the diagonals , and of the verticals indicate the zero points for the third , second , and first figures respectively , the second of each of them stands for , and is marked ...
Page 12
... third figure , 3 , must be subtracted , leaving 32 ; since three divisions of the vernier scale will contain three of these subdivisions , together with three - tenths of a subdivision . Place , then , one point of the compasses upon ...
... third figure , 3 , must be subtracted , leaving 32 ; since three divisions of the vernier scale will contain three of these subdivisions , together with three - tenths of a subdivision . Place , then , one point of the compasses upon ...
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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
Popular passages
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