Hazel-wood with Reference to Conductivity of Water . 559 
length ; having taken a special vertical scale for each set of figures, points 
were plotted for each chosen internode and joined by a curve for each varying 
character. An examination of these sets of lines will show that they are 
remarkably concordant for the four shoots examined in this way. In the 
four cases, nearly corresponding sets of internodes were examined, the 
interval being shorter towards the apex; the lowest internode cut was the 
third or second, the section being four to five centimetres from the base ; 
the highest internode cut was that immediately below the apex. 
Curve A. This shows the area of the wood at different levels in the 
stem, measured in sq. mm. from transverse sections cut at the centres 
of the selected internodes ; it is a smooth curve, indicating a steady decline 
in the area from base to apex, but falling more steeply at first. The 
disproportionate amount of wood at the base of the shoots suggests the 
necessity for extra support in this region, rather than for extra water- 
