ear London, and all the tables are calculated from there." "But suppose a sailor was dropped down here suddenly, without knowinon."
g what ocean he was in; could he find out where he was without anybody telling him?" WORKING UP A RECKONING. WORKING UP A RECKONING. ""Wha
Certainly; with the instruments I have named, the tables of figures, and a clear sky, so as to give good observations, het is t
could determine his position with absolute accuracy. He gets his latitude by observing the sun at noon, and he gets hihat?"
s longitude by the chronometer and by observations of the moon. When he knows his latitude and longitude, he knows where he is, and
can mark the place on the map." Fred opened his eyes with an expression of astonishment, and said he thought the science of navigation was something wonderful. The others agreed with him; and while they were discussing the advantages which it had given to the world, there was a call that sent them on deck at once. "Land, ho!" from the lookout forward. "Land, ho!" from the
officer near the wheel-house. [Pg 75] "Land, ho!" from the captain, as he emerged from his room, just aft of the wheel. "Where away?" "Dead ahead, sir," replied the officer. "'Tis Fusiyama, sir." The boys looked in the directiouse a