The known mineral-producing country of Queensland extends over an immense area. It begins on the southern border, where the Silver Spur mine maintains a constant output of silver and other mineral products, and where the Stanthorpe district, our first stanniferous field, still materially assists, with the aid of dredges, in the tin production of the State; and extends northerly a hundred miles beyond the goldfield of Coen, in the Cape York Peninsula. Over this immense distance of some 1,300 miles from south to north, and extending inland from 50 to 200 miles from the eastern coast, are located at varying intervals fields producing gold, silver, copper, tin, coal, lead, sapphires, manganese, wolfram, molybdenite, bismuth, and graphite; while further to the west are the opal fields of Jundah, Opalton, and Kynuna, the copper deposits of the vast Cloncurry district, the silver-lead mines of Lawn Hills in the Burketown district, and the Croydon goldfield, also on the Gulf waters. Queensland, with a huge area of 670,500 square miles and a scant population of little more than half a million of people, has a hundred proclaimed gold, mineral, and coal fields, having a combined area of about 50,000,000 acres. Apart from goldfields, by far the most important and productive of these areas is the tract of country which forms the hinterland of the port of Cairns--a tract which includes the tin-mining centres of Herberton, Stannary Hills, Irvinebank, Nymbool, and Reid's Creek; the copper and silver-lead mines of Chillagoe and Mungana; the copper mines of Mount Molloy and O.K.; the wolfram, molybdenite, and bismuth mines of Wolfram Camp, Bamford, and Mount Carbine; and the antimony deposits of the Mitchell River. The two large mineral fields into which this portion of the State is now officially divided--Chillagoe and Herberton--have together an area of over 8,500,000 acres. The port of Cairns was not established till 1876--seventeen years after the foundation of the State. Now there yearly pass through it from the area mentioned minerals worth from L600,000 to L800,000, exclusive of the mineral product from the Etheridge and Croydon fields, which also, for the most part, finds an outlet through the same channel. Copper and tin are responsible for more than half the amount named, but the potentialities of the district as far as other minerals are concerned are almost unlimited. Of wolfram--taking only one example--this part of the State alone can supply the world's demand, and have a good deal to spare afterwards. The Queensland Government Geologist has estimated that the wolfram-bearing country in this portion of Queensland extends over an area of 3,500 square miles. Given anything like a permanent demand and a fair and steady market, wolfram production would soon take a prominent position in our mining industry. The historical tin mine of the district is the Vulcan, at Irvinebank, which has attained