ANNIVERSARY ADDRESS. 25 
I consider that the high crushing resistance of the New South 
Wales cokes (as shown by my experiments in the University 
testing machine), justifies the more extended use of coke-concrete 
in the floors of bridges and buildings where strength and lightness 
combined are necessary. The crushing resistance of the New 
South Wales cokes varied from one thousand one hundred and 
twelve to three thousand one hundred and twenty-five pounds per 
square inch, while the greatest strength of the imported cokes 
tested was only seven hundred and sixty-five pounds per square 
inch. 
Mr. J. B. Jaquet, a.R.s.M., F.G.S., has during the past year 
completed his geological survey of Broken Hill, and has furnished 
reports upon the Nuntherungie silver-field, the platinum deposits 
near Broken Hill, and the opal-fields at White Cliffs near Wilcannia. 
Mr, Robert Etheridge, Jun., has done a large amount of useful 
work in determinative and descriptive paleontology during the 
year, and has published another valuable memoir on the carboni- 
ferous and permo-carboniferous invertebrata of New South Wales. 
Mr. Etheridge has written about twenty papers this year for the 
Records of the Geological Survey, the Linnean Society, and 
other societies, the titles of which would occupy more space than 
I can afford for this address, 
Mr. C. W. Marsh of Broken Hill has discovered a new mineral 
having a definite crystalline form, and consisting of iodide of 
copper. Professor Liversidge has given to this mineral the name 
“ Marshite ” in honour of the discoverer. 
Appointment of Metallurgist.—In June, 1886, it was decided 
that efforts should be made to secure the services of a thoroughly 
competent metallurgist, to take charge of the metallurgical works 
to be established on a suitable site in Sydney. Advertisements 
were published, and inquiries instituted in Europe and America, 
which resulted in a number of applications. A Board was 
appointed to make a selection, consisting of Mr. Cosmo Newbery, 
C.M.G., of Melbourne, Professors Liversidge and David, Dr. 
