The polymeter, or quintant |
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Page ix
... fall the anchor , the ship will be exactly in a straight line between the objects . Other uses will present themselves immediately to the navigator whereby much labour in computation and inconve- nient reference to books and Tables will ...
... fall the anchor , the ship will be exactly in a straight line between the objects . Other uses will present themselves immediately to the navigator whereby much labour in computation and inconve- nient reference to books and Tables will ...
Page 4
... fall in within any of the diameter graduations of the disc ( which will almost invariably happen in the case of foreign ordnance ) , then the diameter of the shot may be found by this simple rule . Supposing for example that the ...
... fall in within any of the diameter graduations of the disc ( which will almost invariably happen in the case of foreign ordnance ) , then the diameter of the shot may be found by this simple rule . Supposing for example that the ...
Page 11
... falls upon " the mirror is called the Angle of Incidence . This is the explanation and illustration of what is meant by the phrase in optical science ; " the angle of incidence is equal to the angle of reflection , and vice versa ...
... falls upon " the mirror is called the Angle of Incidence . This is the explanation and illustration of what is meant by the phrase in optical science ; " the angle of incidence is equal to the angle of reflection , and vice versa ...
Page 13
... fall into a recess cut for it on the face of the instrument , like the semi - circular mirror , already described . This Annex is a piece of SPECULUM placed at an angle of 50 ° with the Sight - Line of the instrument , the consequence ...
... fall into a recess cut for it on the face of the instrument , like the semi - circular mirror , already described . This Annex is a piece of SPECULUM placed at an angle of 50 ° with the Sight - Line of the instrument , the consequence ...
Page 22
... fall against the graduation 30 ° , that will indicate that the object bears from the Magnetic Meridian 60 ° west . Had the half- arrow pointed at 70 ° it would have indicated that the object bore 140 ° westward of North . In the same ...
... fall against the graduation 30 ° , that will indicate that the object bears from the Magnetic Meridian 60 ° west . Had the half- arrow pointed at 70 ° it would have indicated that the object bore 140 ° westward of North . In the same ...
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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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