The polymeter, or quintant |
From inside the book
Results 1-5 of 14
Page ix
... marked will readily give the complement of the angle , to degrees , in any observation , and the subdivision of the degree must be obtained by computation from the vernier , i.e. adding the reading that the vernier presents when the ...
... marked will readily give the complement of the angle , to degrees , in any observation , and the subdivision of the degree must be obtained by computation from the vernier , i.e. adding the reading that the vernier presents when the ...
Page 6
... marked off . The numbering of the yards is made to read from the centre outwards , on both legs of the instrument . Each numbered interval indicates 100 yards , and therefore each small division represents 50 yards . The whole length of ...
... marked off . The numbering of the yards is made to read from the centre outwards , on both legs of the instrument . Each numbered interval indicates 100 yards , and therefore each small division represents 50 yards . The whole length of ...
Page 7
... marked off be greater than this , the opening of the legs to a straight line will give you any length by prolonging it , when drawn by shifting the ruler sideways against the Metal Ruler , so held that it may be slid along in a right ...
... marked off be greater than this , the opening of the legs to a straight line will give you any length by prolonging it , when drawn by shifting the ruler sideways against the Metal Ruler , so held that it may be slid along in a right ...
Page 11
... the disc at the point marked west , we find the legs of the sector are expanded to an angle of 25o , we know then that the angle tcb is 50o . The angle , however , that is wanted is , THE REFLECTING SECTOR OR QUINTANT . 11.
... the disc at the point marked west , we find the legs of the sector are expanded to an angle of 25o , we know then that the angle tcb is 50o . The angle , however , that is wanted is , THE REFLECTING SECTOR OR QUINTANT . 11.
Page 14
... marked on the brass ring , or , it is 100 double the reading . - It is to be understood that this is not a Double Sextant in the sense of the Repeating Circle , or other sextants which take two observations and realize a great angle by ...
... marked on the brass ring , or , it is 100 double the reading . - It is to be understood that this is not a Double Sextant in the sense of the Repeating Circle , or other sextants which take two observations and realize a great angle by ...
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Common terms and phrases
angle of elevation angle required Annex Artificial Horizon base centre circle Clinometer Compass-leg Conic Sections constructed Crown 8vo diameter Differential Calculus dimensions distance division draughtsman English Mile English Yards engraved equivalent number Friedrichs d'or German given angle given side given to find graduated disc half-arrow hinge-joint hypotenuse inches inner edges joint length Line of Lines lower leg magnetic bearing Marquois Scales measure ment Meridian metal Square metre Millimetres Mirror number of yards observed Open the instrument Open the Sector opposite leg outer edge parallel Parallel Ruler perpendicular plane Polymeter Proportional Compasses Protractor quadrant Quintant radius required angle required triangle right angle right-angled triangle ruler Russian Werst scale of equal secant lines Second Edition Sector's legs set of graduations Sextant shadow sight-vane Sine sion slided Spirit-Level stands tenuse third angle Third Edition third side Treatise Trigonometer University of Cambridge Vernier Scale
Popular passages
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