PLATE XXXIII 
Showing method of using rag doll in inoculations (a, b, c) and also (d) vial and 
paper cylinder for soil inoculation: a, the rag doll unrolled in sterile Petri-dish, and 
aseptic wheat seedlings in place, ready for inoculation; 6, doll in place in tube 
and seedlings growing; c, showing development of root hairs in condition for inocu- 
lation below the doll; d, as stated above. 
