English Summary

the observer’s latitude when a star passes at the superior meridian (pp. 64–65). The author proposes four other problems solved by Archer is his text. The fifteenth lecture regards the correction to apply to the observed heights of the stars to obtain the true height. The sixteenth lecture is dedicated to formulas to calculate the variation of the magnetic needle. The last three lectures concern respectively the deviation of the ship caused by the wind’s effect; the manner to write the navigation diary and the tides’ calculation. by the that has a the