ILLUSTBATED GUIDE. 



81 



year. The seed, one hundred to the pound, ' may be 

 sown in the fall, or preserved till spring in damp 

 sand, kept cool. Sow exactly as advised for the hickory, 

 and cut off the tap-root in the same way : the result 

 of this treatment will be identical in both cases. To 



63, — Leaf and nuts of black-walnut. 



make this operation the clearer, I offer an engraving 

 N6. '70, p. 85, of a year-old oak witk its tap-root, another, 

 No. '71, p. 86, the same without the tap-root ; and a 

 third, No. *J2, p. 8*7, depicting it a year after the ampu- 

 tation. It will be seen, by the last cut, that the excision 



65.— cjeed of tulip-tree. 



-Liriodendton tuHpiferum — 

 Leaf of tulip- tree. 



of the tap-root has had the effect of causing the plant to 



throw out a great number of hairy rootlets, by means of 



which it has been able to assimilate a greater quantity of 



nourishment in a given time. In its youth, the oak, like 



the hickory, should be mixed with other species for 



G 



