Nine Geometricall Exercises: For Young Sea-men, and Others that are Studious in Mathematicall Practices ... All which Exercises are Geometrically Performed, by a Line of Chords and Equal Parts, by Waies Not Usually Known Or Practised. Unto which the Analogies Or Proportions are Added, Whereby They May be Applied to the Chiliads of Logarithms, and Canons of Artificiall Sines and TangentsJ. Flesher, 1704 - 192 pages |
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... thereof are Given , by the de- mand in the Question ; and then the Part or Parts Unknown will be such ( as being found ) will anfwer the Question demanded : And herein the Excellency of the Doctrine of Plain Triangles is in part made ...
... thereof are Given , by the de- mand in the Question ; and then the Part or Parts Unknown will be such ( as being found ) will anfwer the Question demanded : And herein the Excellency of the Doctrine of Plain Triangles is in part made ...
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... thereof in Logarithmical Arithmetick . Thus having given the Reader a General Ac- count in this Preface , I refer him to a more Par- ticular in the following Contents , and so leave him to the Practice of them : In which I wish him good ...
... thereof in Logarithmical Arithmetick . Thus having given the Reader a General Ac- count in this Preface , I refer him to a more Par- ticular in the following Contents , and so leave him to the Practice of them : In which I wish him good ...
Page 3
... thereof Equal , then either of those Angles is a Right Angle ; and the Right Line which standeth erected is called a Perpendicular Line to that Line upon which it ftandeth . So upon the Right Line CD , suppose there do stand another Fig ...
... thereof Equal , then either of those Angles is a Right Angle ; and the Right Line which standeth erected is called a Perpendicular Line to that Line upon which it ftandeth . So upon the Right Line CD , suppose there do stand another Fig ...
Page 7
... thereof , being equal to the Angle CEB on the other Side . PROB . I. Upon any Point ( as O ) taken in the Right Line QR , to eret a Perpendicular O S. Practice . First , Open the Compaffes to any small Distance and setting one Foot in ...
... thereof , being equal to the Angle CEB on the other Side . PROB . I. Upon any Point ( as O ) taken in the Right Line QR , to eret a Perpendicular O S. Practice . First , Open the Compaffes to any small Distance and setting one Foot in ...
Page 12
... be equal to the given Line A. Fic Praffice . First , Make the Line BC for one side of the Square , equal to the given Line A , and on one End thereof , XXIII . as L : Fig . XXIV .. Fig . XXV .. 12 Clavis Mathematica .
... be equal to the given Line A. Fic Praffice . First , Make the Line BC for one side of the Square , equal to the given Line A , and on one End thereof , XXIII . as L : Fig . XXIV .. Fig . XXV .. 12 Clavis Mathematica .
Other editions - View all
Nine Geometricall Exercises: For Young Sea-Men, and Others That Are Studious ... William Leybourn No preview available - 2015 |
Nine Geometricall Exercises: For Young Sea-Men, and Others That Are Studious ... William Leybourn No preview available - 2018 |
Common terms and phrases
Acute Aldebaran alſo Azimuth Baſe becauſe Cafe Canons for Calculation Cathetus Centre CHAP Co-fine Co-tangent Compaſſes Declination Degrees deſcribe the Arch Dial Diameter Difference of Longitude Diſtance Ecliptick equal Equinoctial Extream fame firſt Foot fuch given Line Globe half Difference half Sum half the Difference half the Sum hath Horizon Hour-lines Hours Hypotenuse Index Interfection Leffer Logar Longitude Meaſure Meridian muſt North Number Oblique obſerved Obtufe oppofite Parallel Perpendicular Place Plain Triangle Planets Point Pole PROB Proportion Quadrant of Altitude Radius Rectangle refolved reſpect Right Afcenfion Right Angles Right Line Rumb ſame ſet ſeveral ſhall ſhew Sine Sine 90 Sine of half South Spherical Triangle ſtand Star Stile ſubſtracted ſuch Sun's ſuppoſe Tangent of half thereof theſe thoſe thoſe Sides Trigonometrical Calculation Verſed Sine Weft whoſe
Popular passages
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Page 253 - The stomachs of birds shot at all times of the year and in all parts of the state, have been preserved in alcohol, each labeled with name, date and locality.
Page 3 - A circle is a plane figure contained by one line, which is Called the circumference, and is fuch that all ftraight lines drawn from a certain point within the figure...
Page 71 - That i г is, the tangent of half the bafe is to the tangent of half the fum of the...
Page 39 - So is the Tangent of half the Sum of the oppofite Angles to the Tangent of half their Difference.
Page 72 - Prove that, in any plane triangle, the base is to the difference of the other two sides, as the sine of half the sum of the angles at the base, to the sine of half their difference : also, that the base is to the sum of the other two sides, as the cosine of half the sum of the angles at the base, to the cosine of half their difference. Ex.
Page 221 - Bring 22 d. of Capricorn to the Meridian, and fet the Hour Index to 1 2. Then turn the Globe about till Aldebaran be under the Meridian, and then you (hall find the Index to point at 42 m.
Page 165 - A line drawn from one pole to the other is called the axis of the magnet-.
Page 30 - Diameter pafllng thro' the other End ; or it is half the Chord of twice the Arch ; fo BF is the Sine of the Arches BA, BD.
Page 218 - Bring 2 1 d. of Capricorn to the Meridian, and the Index to 1 2 a Clock. Then move the Globe and Quadrant of Altitude fo together, that the Great Dog meet with 14 d.