Photograph 1. — The four pots to the left are sowed to oats, Nos. 1 and 2 contain Canada thistles as 

 well. Ncs. 3 and 4 contain oats alone. 



The pots to the right contain buckwheat; Nos. 1 and 2 contain thistles also; 3 and 4 are clean. 

 I'he pots to the left are 4-inch pots and the other 6-inch. 



Photograph 2 — Nos. 1 and 2 contain oats, and in each of the two pots is a young elm tree, Nos. 2 

 and 4 contain oats alone. Six inch pots. 



