EXPLANATION OF PLATE LXXIV. 



Aperture in a liollow tree-butt, ;it a lieight of from four to six feet from the 

 ■^rouiiil. tliiMiiuli wliii'li llir liuiirs ul' ;i ilcrc;i-ci I pcr-.m. .-iflcr ilisinicriiiriil . 

 \v<Tc |>;i>-c<l r.M' liruil ~.'|iiilclirc. ('c.;i~t line- rroiii .\l;ick;i\ ..ri I lu- nm-llit.. 



