Baron Von Groddeck, Chief Mining Councillor
of the Hartz Mining Districts and Director
of the Royal Prussian Academy of mines at Clausthal,
Germany.
Translated by G. Thureau, F.G.S., Govornment
Geologist and Inspector of Mines, from the Special Imprint of
the Journal of the German Geological Society of 1884.
The Royal Academy of Mines at Clausthal was some
time ago placed in possession of a very fine collection of
Australian ores. That collection was presented to our
Academy by M. Wagenknecht, of Aachen (a Fellow of the
Royal Society of Tasmania).
Amongst the samples were found a number of specimens.
of Tin Ore, together with the rocks and the minerals said to
be associated with same, from Mt. Bischoff, Tasmania. The
series interested me, particularly on account of a piece of
supposed Quartz-Porphyry, which rock, it was represented,
is associated (according to the description of S. H. Wintle*
and Geo. H. P. Ulrich) with those Tin Ores, and also because
of some peculiar, dense, greyish-blue coloured masses
of mineral which most frequently are found to enclose
those Tin Ores.
* S. H. Wintle ; Stanniferous Deposits of Tasmania. Trans. Royal
Society of New South Wales, 1875, vol. ix., page 87.
Geo. H. F. Ulrich. Written communication ; New York Book for
Mineralogy, etc., 1877, page 494