170 



IOWA ACADEMY OP SCIENCE Vol. XXVI, 19i'J 



\\>i/( M'"" V"' V" '"'. re. 



Clean culti u^fec^ Jr^ct 



■cJ foh / ro^te<J 





Fio. 41. — Barberry on the Perkins place, Burlington. Barberry hedge re- 

 moved in May. (C. M. King.) 



