Louis Christian Petersen, Educational Toys
“ They should be taught knot-tying and its application in an intelligent and thoro manner, and have frequent practice-drill therein, till it becomes second nature to them.When a knot is tied, it must be pulled together tight, so as to stay. Otherwise, especially if the cord is stiff, the loops will slide apart or flop out of position, and the knot will come loose. A knot derives its strength and reliability from the friction between its different parts. ”
