The Theory and Practice of Finding the Longitude at Sea Or Land: To which are Added, Various Methods of Determining the Latitude of a Place, and Variation of the Compass; with New Tables. By Andrew Mackay, ...J. Sewell, P. Elmsly, and J. Evans, 1793 |
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Σελίδα 14
... tangent to its orbit , it is then at its greatest eastern or weftern elongation -- the elongation at any other time is measured by the angle contained between lines drawn from the center of the earth to the centers of the fun and planet ...
... tangent to its orbit , it is then at its greatest eastern or weftern elongation -- the elongation at any other time is measured by the angle contained between lines drawn from the center of the earth to the centers of the fun and planet ...
Σελίδα 34
... tangent fcrew , by which a slow motion may be given to the index . Hence thofe fudden ftarts , to which it is liable when moved by hand , are prevented . A fmall magnifying glass will be found of great fervice , in read- ing off the ...
... tangent fcrew , by which a slow motion may be given to the index . Hence thofe fudden ftarts , to which it is liable when moved by hand , are prevented . A fmall magnifying glass will be found of great fervice , in read- ing off the ...
Σελίδα 39
... tangent fcrew , by which the index may be moved flowly and regularly , and therefore the contact of the limbs of any two objects may be made as perfect as the eye is able to diftinguish , when affifted with one of the telescopes , which ...
... tangent fcrew , by which the index may be moved flowly and regularly , and therefore the contact of the limbs of any two objects may be made as perfect as the eye is able to diftinguish , when affifted with one of the telescopes , which ...
Σελίδα 58
... to the eye of * Philofophical Tranfactions for 1790 , Part 1 . an † Any transparent fubflance , as the atmosphere , water , glass , & c . is called a medium . an obferver ; and the angle contained between the tangent ( 58 )
... to the eye of * Philofophical Tranfactions for 1790 , Part 1 . an † Any transparent fubflance , as the atmosphere , water , glass , & c . is called a medium . an obferver ; and the angle contained between the tangent ( 58 )
Σελίδα 59
... tangent to this curve at the eye , and a straight line from the eye to the object is called the Refraction . ILLUSTRATION . Let the circle ABC ( fig . 22. ) reprefent a fection of the earth , DEF the furrounding atmosphere , S the ...
... tangent to this curve at the eye , and a straight line from the eye to the object is called the Refraction . ILLUSTRATION . Let the circle ABC ( fig . 22. ) reprefent a fection of the earth , DEF the furrounding atmosphere , S the ...
Άλλες εκδόσεις - Προβολή όλων
The Theory and Practice of Finding the Longitude at Sea Or Land: To Which ... Andrew MacKay Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2015 |
The Theory And Practice Of Finding The Longitude At Sea Or Land Andrew MacKay Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2018 |
Συχνά εμφανιζόμενοι όροι και φράσεις
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