Navigation made Easy; ... or, the young Sailor's sure guide and Scholar's best instructor in the Art of Navigation, etc
... an observation on the meridian altitude of the sun was at least the Cbgf da#39;a- uvre, if not the only certain exPedient they ... That must certainly be very usesul ; for it may frequently be hazy, or foggy, in the middle part of a day, or in one part os it, anbsp;...
| Title | : | Navigation made Easy; ... or, the young Sailor's sure guide and Scholar's best instructor in the Art of Navigation, etc |
| Author | : | John MALHAM |
| Publisher | : | - 1790 |
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