PRESIDENTIAL ADDRESS. 9 
Dr. ROBERT LOGAN JACK, LL.D., F.G.S., M. Inst. MM, died 
on the 6th November, 1921, in his 77th year. Dr. Jack 
was not a member of this Society, but he was a distinguished 
geologist to whom the Clarke Memorial Medal of this 
Society was awarded in 1895. The Clarke memorial Medal 
was given during the same year to Robert Etheridge Junior, 
who had collaborated with Dr. Jack in the preparation of 
a memorable publication dealing with the Geology of 
Queensland. Dr. Jack's family was a distinguished one, a 
brother having won the title of Senior Wrangler. Dr. Jack 
was born at Irvine, Ayrshire, Scotland, in 1845, and was 
educated at Irvine Academy, and Edinburgh University. 
After a service of ten years with the Scottish Geological 
Survey, he accepted the position of Government Geologist 
in Northern Queensland in 1877, and soon afterwards 
became the Government Geologist for the whole State. 
This position he resigned in 1899. During the same year 
he lead an expedition in Western China. ‘On this expedition 
he was accompanied by his son, Mr. Lockhart Jack, Assist- 
ant Government Geologist in South Australia. Between 
the years 1899 and 1904 a considerable portion of his time 
was occupied in private practice as a consulting geologist 
in England, but in 1904 he was appointed by the Govern- 
ment of West Australia as a Royal Commissioner on the 
‘Collie coal field, and in 1911 he was appointed Chairman of 
the Royal Commission to investigate and report on the 
lung diseases to which miners are particularly susceptible. 
Dr. Jack was the author of a number of works including 
“The Minerai Wealth of Queensland” (1880), ‘‘ Handbook 
to Queensland Geology’’ (1886), and “‘The Geology and 
Paleontology of Queensland and New Guinea”’ (1893, two 
vols.). The latter was written in collaboration with Robert 
Etheridge Junior. His latest book entitled ‘‘Northmost 
Australia’’ has been published recently in London. 
