DBie M. B. WELCH. 
ever, several small oily spots were seen on end section, 
Otherwise the wood was free from stain. 
Pieces of Rosewood of various ages after felling were 
placed under the receiver of a vacuum pump, and the pres- 
sure reduced to a few inches of mercury. There was, 
however, no alteration in the appearance of the timber. 
An examination was also made of the heart-wood of 
Dysoxylon Muelleri, Red Bean, and D. Pettigrewanum, 
Satin-wood, and although it was proved thata small quantity 
of oleo-resin was present, no evidence has been found, as 
far as the former timber is concerned, that any sweating 
occurs. Both timbers are also, when seasoned, almost 
devoid of smell. 
A transverse section of the wood of D. Fraseranum 
(Fig. 1) shows it to be a diffuse porous type. The vessels 
are comparatively large, measuring up to 0°18 m.m. in 
diameter, and are often solitary or grouped into rows of up 
to about five. In many of them is the characteristic dark 
brown insoluble deposit found in this timber. At right 
angles to the medullary rays are numerous bands of thick 
walled wood fibres, alternating with irregular zones of 
metatracheal xylein parenchyma. Figure 2 shows a more 
highly magnified transverse section than the preceding 
one. The deposit in the vessels is amorphous and often 
irregularly cracked. About the middle of the field and 
towards the bottom are two bands of the oil bearing paren- 
chymatous tissue. The cells are rather thick walled, and 
the walls, particularly the end ones, bear numerous oval or 
round simple pits. 
Figure 3 shows a longitudinal tangential section of the 
heart-wood. The irregular nature of the insoluble deposit 
in the vessels is typical. The medullary rays are usually 
multiseriate, consisting of two rows of cells. The wood 
