THE nock of the arrow may break in one of two ways: it may either split in two and break, or its right lip may break. It may split in two because of the narrowness of its notch throughout its depth and the thickness of the string, or because of the narrowness of its lower part so that the string fails to reach its bottom; instead, it breaks under the thickness and pressure of the string. This can be remedied by enlarging the nock with the aid of a file. Breaking the right side or lip of the nock is a grave blemish, and occurs only to ignorant beginners. It can be remedied by relaxing the pressure of the base of the index finger on the nock and by discontinuing to exert any weight thereupon.