CIV. JAMES NANGLE. 
Mr. NANGLE’S EXHIBIT OF MICROSCOPIC SECTIONS OF 
AUSTRALIAN TIMBER. 
The exhibit consisted of transverse sections of Ironbark, 
Red Slaty Gum, Tallow-wood, Blackbutt and other species 
of Kucalyptus, also photomicrographs of the sections. Mr. 
Nangle stated that he had for some time been engaged in an 
examination by the microscope of the species of Eucalyptus 
which closely resembled each other to the naked eye, with 
a view to detecting differences of an exact character. He 
hoped to be able to determine something in the way of 
a type specimen for each species when subjected to micro- 
scopic examination. The subject was a large one, and as 
yet but little progress has been made. With great diffi- 
dence he brought the specimens and the results he had so 
far obtained before the Section. By the kindness of Dr. 
Quaife the specimens were projected, greatly magnified, 
on to the large screen, and members were able to judge 
for themselves as to what differences were noticeable. 
Mr. Nangle stated that so far he had noticed, with cer- 
tainty, the following points:—1. That in sound dense timbers 
like ironbark, the vascular cells were small, (compare Plate 
23, figs. 1, 2, and Plate 24, fig. 3). It will be seen that in 
Ironbark the cells are much smaller. 2. The medullary 
rays were strong and well defined, (compare Plate 24, fig. 
4, and Plate 25, fig. 5). The medullary rays are much 
stronger in the Ironbark than in the Red Slaty Gum. In 
the latter they are deformed. 3. That scattered cells in 
the woody tissue were sparse, (compare Plate 24, fig. 4s 
and Plate 235, fig. 5). 
Some timbers, like Tallow-wood and Blackbutt, were 
very much alike in transverse section, but a difference was 
noticeable in longitudinal sections, in which, in the case of 
Tallow-wood, the vascular cells were shorter than in Black- 
butt on account of the greater twisting and interlocking of 
