## 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 Tangents |

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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 Æquinoctial alſo Anomaly Arch Azimuth Baſe becauſe beginning called Canon Caſe Centre Circle Co-fine Complement contained Declination deſcribe Dial Diameter Difference Diſtance divided draw drawn Earth Eaſt Ecliptick equal Example Extream fall fame Figure firſt Foot given gives Globe Greater half Sum hath Horizon Hour-lines Hours Index Latitude Length leſs London Longitude Mars Meaſure Meridian Middle Miles muſt North noted Oblique obſerved oppoſite Parallel Perpendicular Place Plain Planets Point Pole Poſition PROB Problem Proportion Quadrant of Altitude Radius Right Angles Right Line Riſing Rumb ſame ſet ſeveral ſhall Side Sign Sine South Sphere Spherical Triangle Square Star Stile ſuch Sun's Table Tangent of half thereof theſe third thoſe Three Trigonometrical Calculation turn Weſt whoſe

### Popular passages

Page 177 - Ocean, the first thing which strikes us is, that, the north-east and south-east monsoons, which are found the one on the north and the other on...

Page 255 - 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 73 - That i г is, the tangent of half the bafe is to the tangent of half the fum of the...

Page 41 - So is the Tangent of half the Sum of the oppofite Angles to the Tangent of half their Difference.

Page 74 - 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 223 - 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 32 - 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 220 - 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.