A Compleat Treatise of Practical Navigation Demonstrated from It's First Principles: Together with All the Necessary Tables. To which are Added, the Useful Theorems of Mensuration, Surveying, and Gauging; with Their Application to Practice. Written for the Use of the Academy in Tower-StreetJ. Brotherton, 1734 - 414 σελίδες |
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Σελίδα 45
... Feet , Yards , Miles , & c . ) and the Angle A 33 ° , 40 ' re- quir'd the other Leg BC in the fame parts with A B. Geometrically . Draw A B equal to 86 , from any Line of equal parts , then ( by Prob . 4. of Sect . 1. ) upon the point C ...
... Feet , Yards , Miles , & c . ) and the Angle A 33 ° , 40 ' re- quir'd the other Leg BC in the fame parts with A B. Geometrically . Draw A B equal to 86 , from any Line of equal parts , then ( by Prob . 4. of Sect . 1. ) upon the point C ...
Σελίδα 73
... Feet , is call'd the Nadir . 21. Vertical or Azimuth Circles , are great Circles paffing thro ' the Zenith and Nadir , and cutting the Horizon at right Angles . Among the Vertical Cir- cles there are two principal ones , viz . the ...
... Feet , is call'd the Nadir . 21. Vertical or Azimuth Circles , are great Circles paffing thro ' the Zenith and Nadir , and cutting the Horizon at right Angles . Among the Vertical Cir- cles there are two principal ones , viz . the ...
Σελίδα 143
... at the distance of about 10 Fathom , or 60 Feet from the Log ; that fo the Log , when it is hove over Board , may be out of the Eddy of the Ship's Wake before before they begin to count , and for the more Of the Log - Line and Compass .
... at the distance of about 10 Fathom , or 60 Feet from the Log ; that fo the Log , when it is hove over Board , may be out of the Eddy of the Ship's Wake before before they begin to count , and for the more Of the Log - Line and Compass .
Σελίδα 144
... Feet , therefore a Degree of a Meridian will be about 367200 Feet ; whence the of that , viz . a Mi- nute , or Nautical Mile , muft contain 6120 ftandard Feet ; confequently fince Minute is the 10 part of an Hour , and each Knot being ...
... Feet , therefore a Degree of a Meridian will be about 367200 Feet ; whence the of that , viz . a Mi- nute , or Nautical Mile , muft contain 6120 ftandard Feet ; confequently fince Minute is the 10 part of an Hour , and each Knot being ...
Σελίδα 145
... Feet inftead of 51. Some , upon the Suppofition that 60 Miles makes a Degree on the Meridian , make the Distance between Knot and Knot 42 Feet ; when at the fame time , by common ... Feet , is to 56 Feet Of the Log - Line and Compafs . 145.
... Feet inftead of 51. Some , upon the Suppofition that 60 Miles makes a Degree on the Meridian , make the Distance between Knot and Knot 42 Feet ; when at the fame time , by common ... Feet , is to 56 Feet Of the Log - Line and Compafs . 145.
Άλλες εκδόσεις - Προβολή όλων
A Compleat Treatise of Practical Navigation Demonstrated From It's First ... Archibald Patoun Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2017 |
A Compleat Treatise of Practical Navigation Demonstrated From It's First ... Archibald Patoun Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2017 |
A Compleat Treatise of Practical Navigation Demonstrated from It's First ... Archibald Patoun Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
alfo alſo Altitude anfwering Arch Bafe becauſe Cafe called Center Chord Circle Circumference Co-fine Compaffes confequently Courfe Courſe Courſe and Diſtance Declination defcribe Degrees Dep Lat Departure Diameter Diff Difference of Latitude difference of Longitude Dift Diſtance Diſtance fail'd diurnal Motion Dominical Letter draw Eaft Earth Eaſt Ecliptick equal Equator Example faid fhall fide fince firft firſt fome given greateſt half Horizon Hours Interfection Julian Period Knot laft laſt Lati leaft lefs length Logar Logarithm meaſured Meridian Miles Minutes Moon muft muſt North Number Obfervation oppofite paffing Parallel Parallel Sailing perpendicular Point Pole proper difference Rectangular Trigonometry reprefent Requir'd Required right Angles right Line Rumb Secant Sect Ship's Sine South Sun's Suppofe a Ship Table Tang Tangent thefe theſe thro tis plain Triangle true tude Weft whofe
Δημοφιλή αποσπάσματα
Σελίδα iv - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, etc.
Σελίδα iv - A diameter of a circle is a straight line drawn through the center and terminated both ways by the circumference, as AC in Fig.
Σελίδα iv - B is an arc, and a right line drawn from one end of an arc to the other is called a chord.
Σελίδα 19 - ... 1 and 6, 2 and 5, 3 and 4, 4 and 3, 5 and 2, 6 and 1 , 5 and 6, or 6 and 5.
Σελίδα 41 - IN a plain triangle, the fum of any two fides is to their difference, as the tangent of half the fum of the angles at the bafe, to the tangent of half their difference.
Σελίδα 39 - In any triangle, the sides are proportional to the sines of the opposite angles, ie. t abc sin A sin B sin C...
Σελίδα ix - KCML, the sum of the two parallelograms or square BCMH ; therefore the sum of the squares on AB and AC is equal to the square on BC.
Σελίδα 5 - AED, is equal to two right angles ; that is, the sum of the angles...
Σελίδα 5 - Thro' C, let CE be drawn parallel to AB ; then since BD cuts the two parallel lines BA, CE ; the angle ECD = B, (by part 3, of the last theo.) and again, since AC cuts the same parallels, the angle ACE = A (by part 2. of the last.) Therefore ECD + ACE = ACD =1 B + AQED THEOREM V. In any triangle ABC, all the three angles taken together are equal to two right angles, viz.
Σελίδα 53 - IT is well known, that the longitude of any place is an arch, of the equator, intercepted between the firft meridian and the meridian of that place ; and that this arch is proportional to the quantity of time that the fun requires to move from the one meridian to the other ; which is at the rate of 24 hours for 360 degrees; one hour for 15 degrees; one minute of time for.