366 R. T. BAKER. 
4b) Microscopical. 
Transverse.—There are four main features in this section 
which characterise the field of vision ina low power object- 
ive, viz, the medullary rays, fibres, parenchyma and pores, 
and each occupies about an equal area. The wide multi- 
Seriate rays are especially conspicuous, running in broad 
Jines through the picture, with uniseriate ones intervening. 
Between the broad rays the other organs mentioned above 
occur, the fibres and parenchyma alternating in well 
marked loops with the concave side outwards, towards the 
bark. Interspersed amongst the parenchyma, but close up 
to the fibres are pores, mostly empty; tyloses and resin 
were not seen. 
Radial Section.—When cut clear of the rays, the salient 
feature is the columns of fibres separated by their thin 
walled cells from the xylem, parenchyma and vessels. There 
are two kinds of rays, broad and narrow, the latter showing 
to better advantage ina micro-section. Both vary in height 
according to the number of cells in the vertical plane, they 
naturally form a pronounced feature in the section; most of 
the cells contain either an amorphous substance or silica, in 
fact the amount of silica detected in this species exceeded 
that found in any Silky Oak or other species examined. 
Small globular bodies were seen in a few of the cells of 
both the ray and wood parenchyma. Vessels with innumer- 
able bordered pits on the walls form a very attractive 
object in the field of vision. The wood parenchyma appears 
to be of a tracheidal nature, the cells showing bordered 
pits in the radial walls. The fibres run in regular columns 
alternately with parenchyma tissue, and scattered vessels. 
The lumen of the fibres is exceedingly narrow owing to the 
thickened walls of these wood elements. 
Tangential Secttion.—The salient features in this section 
are the multiseriate rays which occupy a large portion of 
