The gentlemans recreation in two parts : the first being an encyclopedy of the arts and sciences ... the second part treats of horsmanship, hawking, hunting, fowling, fishing, and agriculture : with a short treatise of cock-fighting ... : all which are collected from the most authentick authors, and the many gross errors therein corrected, with great enlargements ... : and for the better explanation thereof, great variety of useful sculptures, as nets, traps, engines, &c. are added for the taking of beasts, fowl and fish : not hitherto published by any : the whole illustrated with about an hundred ornamental and useful sculptures engraven in copper, relating to the several subjects.

To keep a Reckoning of 24 Hours without the Log.

THe Method observed by those that judge, of their distance, without a Log, is to have a Board of six Colums; In the first, the Hour is set down; In the second, the Course; In the third, the Miles; In the fourth, the Wind that blows; In the fifth, the force of the Wind; And in the sixth the Variation, and sometimes how the Current sets.

To take the Reckoning from the Log Board, thereby to compute the true Course, and Distance of the Ship, by the several Runs exprest upon the Log, observe this Method; First, double the Knots, half Knots and Fathoms, (if there be any) of each respective Course, by which you may know how many Miles you have sayled; for if they express on the Log-Board, but the Miles sayled in one or two Hours, they must be doubled, to know how many Miles sayled in double the time.

If your Knots be at 42 Foot Distance, from each other, it shews the seventh part of a Mile in an Hour, so that 2 Fathom is some∣thing more than ¼ of a Mile; but if the Knots are distant 50 Foot, then 2 Fathoms are a little less, for a Fathom is but 6 Foot.

The Reckoning is taken from the Log-Board, e∣very Day at Noon, and usually after your Ob∣servation.