The History of Plumbing - Jerusalem From its earliest days, Jerusalem depended on systems of tunnels to supply water to the city. 5000-8000 years ago there were irrigation systems and personal bathrooms with toilets. Plumbers used clay mixed with straw at first, then added copper, bronze, lead, and bitumen. Symbolic Counting Tokens from the Early Near East Photo of clay counters used from 9000 - 1500 BC described as the first system of signs used for transmitting information. Around 8000 BC merchants began to use tokens to record transactions.
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