Page:Physical Geography of the Sea and its Meteorology.djvu/372

346 next place, the north-east trade-wind belt includes more land within it than the south-east; consequently, when the two winds arrive at the calm belt, they are, for this reason, also unequally charged with moisture. Now, when they rise up and precipitate this moisture, more heat is liberated from the south-east than

made on board the '' (frigate), Commander, bearing the flag of Rear-Admiral , for determining the Velocity of the Frigate in all cases, from nearest the Wind to Wind aft.



The different experiments, whose results are inscribed in this Table, were made during the passage from Bahia to France. They were made in the trade-winds, or in fixed and regular winds; nevertheless, even in the trades the regularity of the wind was not always such that some results did not appear to differ a little from the rule. On the other hand, the log itself gives rise to errors sometimes quite large.

In going eight knots we have thrown two logs, simultaneously, without touching the line; the two results differed a knot. The incomplete experiments were interrupted in consequence of the irregularity of the wind, and each result is a mean result.