 | Henry Raper - Nautical astronomy - 1840 - 700 pages
...called stray-line, to let the log go clear of the ship before the time is counted. 172. The log-line is divided into equal portions, called knots, at each...it, is put through the strands. The length of a knot depends on the number of seconds which the glasses measure, and is thus determined : INSTRUMENTS OF... | |
 | Janet Taylor - Nautical astronomy - 1851 - 674 pages
...sufficient quantity of line, called stray line, to let the log go clear of the ship before the line is counted. From this point to the inner end, the...space of time indicated by the glass bears to an hour; hence the length of a knot, adapted to a glass of a given number of seconds, is easily determined.... | |
 | James Pryde - Navigation - 1867 - 506 pages
...stray-line, to let the log-ship be clear of the ship's eddy before the time is counted. 1 6 1. The log-line is divided into equal portions, called knots, at each...it, is put through the strands. The length of a knot depends on the number of seconds that the glass runs, and may be thus determined— -The feet in a... | |
 | Henry Raper - 1870 - 968 pages
...called stray-line, to let the log go clear of the ship before the time is counted. 260. The log-line is divided into equal portions, called knots, at each...it, is put through the strands. The length of a knot depends on the number of seconds which the glasses measure, and is thus determined : The No. of feet... | |
 | Henry Raper - Nautical astronomy - 1882 - 952 pages
...called stray-line, to let the log go clear of the ship before the time is counted. 260. The log-line is divided into equal portions, called knots, at each...it, is put through the strands. The length of a knot depends on the number of seconds which the glasses measure, and is thus determined : The No. of feet... | |
 | William Thomson Baron Kelvin - Science - 1891 - 540 pages
...Astronomy, by Lieut. Henry Raper, RN (tenth edition, 1870; original edition, 1840). " The log-line is divided into equal portions called knots, at each...is put through the strands. " The length of a knot depends on the number of seconds which the glasses measure, and is thus determined : — " No. of ft.... | |
 | Frank Cole Stebbing - Nautical astronomy - 1903 - 364 pages
...to get clear of the ship, and the line run off the reel at uniform speed, before the time is taken. From this point to the inner end the line is divided into equal portions called "knots"; and the number of knots which run out in a fixed time, as measured by a sand-glass, shows the speed... | |
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The log-line is divided into equal portions, called knots, at each of which a bit of string, with the number of knots upon it, is put through the strands. The length of a knot depends on the number of seconds which the glasses measure, and is thus determined... 