Sentence:  For my own stature, which is five feet eight inches, I find that two feet six inches from the heel to the lower <WSD>thole</WSD>, just right, and the <WSD>tholes</WSD> should be eighteen inches apart. For smooth land, the scythe should be three feet nine inches' shorter for lodged clover and rough ground. The point should be set three feet five inches from the upper <WSD>thole</WSD>. 
Meaning of the word marked with <WSD> tags:  A pin, or handle, of the snath (shaft) of a scythe.