ANNIVERSARY ADDRESS. 9 
entomology ; literary work dealing with the flowering plants of. 
the Colony. 
At the University the following subjects have been investi- 
gated, or are in progress of investigation :— 
Biology.—Development of marsupial teeth. 
Physics.—Magnetic properties of bismuth, gravimetric work. 
Electrical properties of selenium. 
Chemistry.—Investigations on occurrence of gold and allied 
chemico-mineralogical matters. On the specific gravities of some 
gem stones. On the separation of gold, silver, and sodium from 
sea water by muntz metal sheathing. On certain new minerals, 
On the occurrence of gold in the Hawkesbury Rocks about 
Sydney. On variations in the amount of ammonia in waters on 
keeping. On the corrosion of aluminium. On crystallised carbon 
dioxide. On the waterproofing of bricks and sandstones with 
oils. On the porosity of cements and plasters. 
Engineering.—Tests of the strength of materials, chiefly 
colonial timbers and cements. 
Geology.— Examination of volcanic glasses of the Tweed district. 
Geology of the Macdonald Ranges. Evidences of the Palzozoic 
Ice Age in Australia. 
Physiology.— The physiological action of snake venom. Coagu- 
lation of the blood. Colouring of wool by micro-organisms. 
As one of what I may, perhaps, be permitted to call the 
current generation of Physicists, I feel that no account of the 
history of physical science of the last few years would be adequate 
Which did not place the death of Helmholtz in the foremost place. 
It is, perhaps, impossible for the present generation of Physicists 
who have been born and bred in the doctrine of the conser- 
vation of energy, to estimate at its true value the assistance 
they bave received at all stages from this all-embracing 
Seneralization. The physics presented to us from our earliest 
youth was already a definite structure of which the ‘‘ Erhaltung 
der Kraft” was the very corner stone. It is not true to say that 
