Mercury (element) long periods at elevated temperatures. It reverts to the elements upon heating near 400 °C, as was demonstrated by Joseph Priestley in an early synthesis of pure oxygen. Hydroxides of mercury are poorly characterized, as they are for its neighbors gold and silver. Being a soft metal, mercury forms very stable derivatives with the heavier chalcogens. Preeminent is mercury(II) sulfide, HgS, which occurs in nature as the ore cinnabar and is the brilliant pigment vermillion. Like ZnS, HgS crystallizes in two forms, the reddish cubic form and the black zinc blende form. The latter sometimes occurs naturally as metacinnabar. Mercury(II)
Wooden toymaking in the Ore Mountains Wooden toymaking in the Ore Mountains The history of wooden toymaking in the Ore Mountains is closely bound to regional circumstances. The Ore Mountains are located in Central Europe on the border between Germany and the Czech Republic. For many centuries it was a countryside in which the local population eked out a hard existence from the land. Long and harsh winters restricted agriculture; in addition the region had very poor communications. With the onset of ore mining a new line of commerce developed, but the hard labour and high risks involved meant that it was only work for young