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(1.) As the Radius 90 degr. is to the Co-sine of the difference of Longitude 40 degr.
So is the Co-tangent of the greater Latitude 50 d. to the Tan∣gent of a fourth Arch 37 d. 10 m. which being substracted out of the other Latitude, and 90 d. added thereto, say,
(2.) As the Co-sine of the Arch found 52 degr. 50 min. is to the Co-sine of the Arch remaining 52 degr. 50 min.
So is the Co-sine of the Latitude first taken 50 degr. 00 min. to the Co-sine of the Distance 40 degr. which taken from 180 degr. there remains 140 degr. for the Distance of the two Places.
So the two Places propounded being the Cape of Good hope, lying in the Latitude of 40 degr. South, and Longitude 50 d. and the other Place Malibrigo, lying in 26 degr. of North La∣titude, and in 180 degr. of Longitude, you may find their Di∣stance by the foregoing Analogie to be 140 degr. which, con∣verted into Miles, make 8400. And such is the Distance of the two Places.