A Complete Treatise of Practical Navigation, Demonstrated from It's First PrinciplesW. Mount, 1770 - 525 sider |
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Side 1
... Science depends upon fome Parts of the Mathematics , which must be known before we can treat of it ; therefore we fhall first lay down the Principles of Geometry ... SECT . SECT . I. Of fuch Geometrical Propofitions as are abfolutely.
... Science depends upon fome Parts of the Mathematics , which must be known before we can treat of it ; therefore we fhall first lay down the Principles of Geometry ... SECT . SECT . I. Of fuch Geometrical Propofitions as are abfolutely.
Side 6
... must be the Sine of 90 Degrees . 22. The Line DB intercepted between the Ex- tremity D of the right Sine and the lower End B of the Arch , is called the verfed Sine of the Arch A B. 23. A right Line BH , drawn perpendicular to a ...
... must be the Sine of 90 Degrees . 22. The Line DB intercepted between the Ex- tremity D of the right Sine and the lower End B of the Arch , is called the verfed Sine of the Arch A B. 23. A right Line BH , drawn perpendicular to a ...
Side 7
... must be so too , i . e . the Arches AC , AD , must be equal ; but the whole CAD is a Semicircle , fince CD , a Line paffing through B 4 a Geometrical Propofitions . 7 .
... must be so too , i . e . the Arches AC , AD , must be equal ; but the whole CAD is a Semicircle , fince CD , a Line paffing through B 4 a Geometrical Propofitions . 7 .
Side 14
... must meet one another on one Side of the Line EF ( fuppofe at G ) and fo form the Tri- angle EFG , one of whofe Sides GE being pro- duced to A , the exterior Angle AEF mult ( by this Article ) be equal to the Sum of the two Angles EFG ...
... must meet one another on one Side of the Line EF ( fuppofe at G ) and fo form the Tri- angle EFG , one of whofe Sides GE being pro- duced to A , the exterior Angle AEF mult ( by this Article ) be equal to the Sum of the two Angles EFG ...
Side 17
... must be equal to the Angle ACD . 63. An Angle , BAD , at the Circumference of a Circle BADE , is but Half the Angle BCD at the Center , ftanding on the fame Arch BED . To demonftrate this , draw through B A and the Center C , the right ...
... must be equal to the Angle ACD . 63. An Angle , BAD , at the Circumference of a Circle BADE , is but Half the Angle BCD at the Center , ftanding on the fame Arch BED . To demonftrate this , draw through B A and the Center C , the right ...
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A Complete Treatise of Practical Navigation, Demonstrated from It's First ... Archibald Patoun Ingen forhåndsvisning tilgjengelig - 2016 |
Vanlige uttrykk og setninger
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Populære avsnitt
Side 50 - In any triangle, the sides are proportional to the sines of the opposite angles, ie. t abc sin A sin B sin C...
Side 25 - Similar figures, are those that have all the angles of the one equal to all the angles of the other, each to each, and the sides about the equal angles proportional.
Side 326 - Solids which decrease gradually from the base till they come to a point, are generally called Pyramids. If the base be a square, it is called a square pyramid; if a triangle, a triangular pyramid ; if a circle, a circular pyramid, or a cone.
Side 213 - ... meridians were drawn parallel to each other, and, confequently, the parallels of latitude made equal to the equator, and fo a degree of longitude on any parallel, as large as a degree on the equator: alfo, in thefe charts, the degrees of latitude were ftill reprefented (as they are in themfelves) equal to each other, and to thofe of the equator; by thefe means the degrees of longitude being increafed beyond their juft proportion, and the more fo 'the nearer they...
Side 113 - ... Sunday of January, in a common year, will show all the Sundays throughout the year, and to whatever days in the rest of the months, that letter is put, these days are all Sundays. If the first day of January be on a Sunday, the next year will begin on Monday, and the Sunday will fall on the seventh day, to which is annexed the letter G, which therefore will be the Sunday letter for that year; the next year beginning on Tuesday, the first Sunday will fall on the sixth of January, to which is adjoined...