388 CRUCIFER^ 



Ex. 200. — Procure a small amount of seed of each of the chief kinds of 

 turnips and swedes from various seedsmen. Sow short rows of each on the 

 farm in order to become acquainted with the form and colours of the root, 

 and the hardness and colour of the flesh. Note the differences in the 

 size of the neck and tap root, and the amount of ' root ' above and below 

 ground. 



Ex. 201. — Sow a few seeds of rape or cole and swede side by side in differ- 

 ent rows or iu different pots of earth and compare the seedlings before and 

 after the foliage-leaves appear. How soon does the swede show that it 

 differs from the rape plant ? 



Ex. 202. — Grind up the seeds of black mustard and mix with water : do 

 the same with those of white mustard. Smell and taste both. 



Ex. 203. — The student should become acquainted with such common 

 crucifers as shepherd's-purse, Jack-by-the-hedge, and hedge mustard. 



