460 BROOKLYN BOTANIC GARDEN MEMOIRS 
normal plants were perfectly free from contact with one another and 
(b) those in which the so-called normal plants were more or less in 
contact with one another. Both of these normal series were compared 
with those in direct contact with wires, etc. The plants in this series 
of experiments all show a gain in height by contact with different 
material. The effects of contact with wire netting (2-in. mesh) as 
compared with no contact whatsoever in the normal plants is given 
Fic. 4. Showing growth of tomato plants in contact and not in contact with 
wire. 
in Tables 2-4. In the former experiment (Table 2) 12 plants were 
utilized, all of which were grown separately, 6 being surrounded by 
cylinders of wire netting and 6 grown free from any contact whatso- 
ever. The plants in contact with wire netting showed a gain in 
height of 31 percent compared with those of the normals and the same 
percentage gain is given in Table 3, in which case the contact plants 
