ILLUSTRATIONS. 



PLATES. 



Page. 

 Pl.\te I. Fig. 1. — BroniHS raa^mosu-^ Pinooth brome-grass. Fig. 2.—Broi)uis 



secalinuft, cheat, or chess -- 



II. Fig. l.—Alsive media, common chickweed. Fig. 2.^Rumex crispiis, 



curled dock. Fig. 3. — Batimt iatula, iim.>^ou weed - - 22 



III. Fig. \.—EUjmm canademls, nodding wild rye. Fig. 2. — Frcu:inus . 



americana, white ash. Fig. 3.— Phytolacca aniericana, poke 22 



TEXT FUirUE. 



Fig. 1 . Diagram showing .order in which seeds were buried 10 



6 



