Fig. 186.
Lines that have both ends made fast may have weights attached to them by means of the sinker hitch ([Fig. 185], D, D, D).
To accomplish this, first gather up some slack and make it in the form of the loop ([Fig. 186], XIV); bend the loop back on itself ([Fig. 186], XV) and slip the weight through the double loop thus formed ([Fig. 186], XVI); draw tight by pulling the two top lines, and the sinker hitch is finished ([Fig. 186], XVII).
The "fire-escape sling" previously mentioned, and illustrated by [Fig. 185], E, is made with a double line.
Proceed at first as you would to make a simple bow-line knot ([Fig. 186], XVIII).
After you have run the end loop up through the turn ([Fig. 186], XIX), bend it downward and over the bottom loop and turn, then up again until it is in the position shown in [Fig. 186], XX; pull it downward until the knot is tightened, as in [Fig. 185], E, and it makes a safe sling in which to lower a person from any height. The longer loop serves for a seat, and the shorter one, coming under the arms, makes a rest for the back.
[Fig. 186½], XXI is called a "boat knot," and is made with the aid of a stick. It is an excellent knot for holding weights which may want instant detachment. To detach it, lift the weight slightly and push out the stick, and instantly the knot is untied.
[Fig. 186½], XXII. Commencement of a "six-fold knot."
[Fig. 186½], XXIII. Six-fold knot completed by drawing the two ends with equal force. A knot drawn in this manner is said to be "nipped."