PLATE 6. 



Fig. a. Radial section of the same. X 100. 



Fig. b. Another of the same. X 500. 



Fig. c. Radial section of the xylem of the cone of Araucaria imhricata, in 

 proximity to the protoxylem. X 500. 



Fig. d. Radial section of the wood of Pinus strobiis. X 150. 



Fig. e. Tangential section of the wood of the cone of Armicaria Bidwillii. 

 X 500. 



Fig. /. Tangential section of the wood of the vegetative stem of the same. 

 X 300. 



