. Letters from Europe to the children; Uncle John upon his travels. oes she go now. and he says, Twelve knots, sir. He means that the shipis going at the rate of twelve miles in an hour;and his face looks bright because the sailors alllike to have the ship go fast. Now, you see that by casting the log severaltimes, and comparing the results, they can inany case know what is the average rate ofsailing. These several results, with the sumof them for each day, they put down in whatis called the log-book. I will tell you what 22 UNCLE JOHN UPON HIS TRA VELS. our log-book showed as to our rate of s
. Letters from Europe to the children; Uncle John upon his travels. oes she go now. and he says, Twelve knots, sir. He means that the shipis going at the rate of twelve miles in an hour;and his face looks bright because the sailors alllike to have the ship go fast. Now, you see that by casting the log severaltimes, and comparing the results, they can inany case know what is the average rate ofsailing. These several results, with the sumof them for each day, they put down in whatis called the log-book. I will tell you what 22 UNCLE JOHN UPON HIS TRA VELS. our log-book showed as to our rate of sailing:On the first day we sailed 237 miles, on thesecond 265, on the third 270, on the fourth281, on the fifth 274, on the sixth 270, on theseventh 292, on the eighth 284, on the ninth300, on the tenth 315, on the eleventh 240. Thesum of all these numbers is 3,028. The distancefrom New York to Liverpool is, I believe, aboutthat. So you see that they can know prettynearly how fast a ship sails every day. There will be something more to tell youin the next
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