now THK l-LANT LIVKS 131 



The stora, therefore, has Rrown throuRliout its lenplh rather than 

 from the end. — Jimlry, " Ltssonn trUh I'lauts" p. 5^2 . 



«06<i. Geriuimite a sqiiush Bet-d between layers of blotting-paper 

 or cloth. When the root has grown an int-h or two lay the plantlet 

 ou H piece of paper. Then lay a rule nlongHide of it, and make 

 a mark (with indelible ink) one-quarter of an ineh, or leus, from 

 the tip, and two or three other marks at equal distances above 

 Fig. 44 >. Now carefully replace the seed. Two days later, 

 examine it; we shall most likely find a condition something like 

 that in F'lg. 4.'k It will be seen that the minks E, C, B, are prac- 

 tically the same distance apart as before, and they are also the 

 same distance from the peg, A A. The point of the root is no 

 longer at I) I), however, but has moved on to F. — Bailey, '^Lessons 

 u-ith Plants," p. .?.»/." 



207a. We now see that the "sap" of trees is a very complex 

 substance. It is the juice or liquid in the plant. The liquid 

 which first comes in at the root is water, with very dilute pro- 

 portions of various substances. But the sap also carries the 

 products of as><iinilation to all parts of the plant, to build up the 

 tissues. In common speech, the upward-moving wafer, recently 

 taken in from the soil, and known as the " transpiratifin stream,'" 

 is often called crude sap; and the liquid carrying sugars and 

 other organic compounds is called elaborated sap. 



20'ki. See the discussions and pictures of moving parts in 

 Bailey's "Lessons with Plants." pp. :i96-40fi; also Barnes' "Plant 

 Life," pp. 188-JOH: Atkinson's "Elementary Botany." pp. 82-9*2; 

 Arthur and MHcDongal's "Living Plants," Chapters i.-iv., and 

 other botanical treatises. 



