560 Holmes.—A Study in the Anatomy of 
conducting tissue. It will be noticed from Fig. 1 that specimens H7, 
H8, and Hio are all about the same length, although H8 has fewer 
nodes. From curve A it is clear that H7 and H8 have a greater area of 
wood in corresponding regions than has Hio ; and that although at the base 
o 
5 ' 
H8 is thinner than H7, in the internodes near the apex H8 has the most 
wood. H9 is shorter than the other specimens, and has the least area 
of wood in corresponding parts. The low figures for the areas of the wood 
in the final internode are quite close together in the four cases. 
