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The elements of navigation; containing the theory and practice. With the necessary tables, and compendiums for finding the latitude and longitude at sea. To which is added, a treatise of marine fortification. Composed for the use of the Royal Mathematical School at Christ's Hospital, the Royal Academy at Portsmouth, and the gentlemen of the Navy .. (1786)

Robertson, J. (John), 1712-1776, Wales, William, 1734?-1798, Wilson, James, M.D., of London · London : C. Nourse · leaf 320

An illustration from The elements of navigation; containing the theory and practice. With the necessary tables, and compendiums for finding the latitude and longitude at sea. To which is added, a treatise of marine fortification. Composed for the use of the Royal Mathematical School at Christ's Hospital, the Royal Academy at Portsmouth, and the gentlemen of the Navy .., 1786, leaf 320
M..: Requiredthe latitude of that place^ and the Suns declination. Let C) N, be the Suns places at W., and at 6 h. 77) oc, N/, the fines of their altitudes. . Q cr=ON, the arcs of declination. Z. cof = z. NO/=latitude. s ccIn Ao^c. As s,oc:r::sjCc:s,jLcocz=-—XR. j,oc In Ao^N. As… … oc=;,27°^/=: 14 24 Its L,t 43i its L.j Sum 00 24 its l 9.662959,40514 cctz 2C° o.-r: 27 19,06809 9,53404 0,33705 /^Q07.^ 48 00 194. 9,87109 P R O B L E xM L. At a place in the wejlirn ocean^ the Sun at rifing was ohferved to he 59*15^ 40 from the true 7icrth point of the hori-zon \ and at 6 /;. A.…

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