Prehistoric technology Ground and polished stone tools continued to be created and used during the Neolithic period. Numeric record keeping evolved from a system of counting using small clay tokens that began in Sumer about 8000 BC. The Stone Age developed into the Bronze Age after the Neolithic Revolution. The Neolithic Revolution involved radical changes in agricultural technology which included development of agriculture, animal domestication, and the adoption of permanent settlements. The Bronze Age is characterised by metal smelting of copper and its alloy bronze, an alloy of tin and copper, to create implements and weapons. Polished stone tools continued to be
Sundown Tin and Copper Mine Sundown Tin and Copper Mining Company (N.L.) which erected a 10-head battery driven by a suction-gas plant, and built two fines dams. No work had been done for some time on the tin portion, but some had been going on for copper. In 1915 a calciner was erected, together with "another" Wilfley concentrating table and a Berdan crushing pan, and a new shaft was sunk on the tin deposit. The new tin shaft had poppet legs erected over it in 1916, and a 16 hp Tangye winding engine and vertical boiler were installed. That year 69.5 tons of tin and