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bushes are placed in the earth with both 

 ends out they will absorb moisture, strike 

 root, and grow. If a long vine branch is 

 coiled round the inside of a flower pot, 

 and covered with earth, as it is ten times 

 as long below the earth as a common cut- 

 ting, it will shoot with ten times as much 

 vigour ; and if heat is given, it will bear 

 fruit the first year. I attribute this to its 

 greater quantity of wood exposed to mois- 

 ture, and its consequent greater power of 

 absorption ; though it may be attributed 

 to its greater space for throwing out 

 side fibres of roots. From these facts I 

 have no doubt that there is a side 

 (lateral vascular) commvmication, both 

 for absorption and exudation, from the 

 heart wood, through the bark, throughout 

 the whole extent of the roots, stem, 

 and branches of trees ; also, that the sap 

 will flow in the heart wood either up- 

 wards or downwards, that is, either from 

 the head towards the root, or from the 



B 2 



