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  2. History of water supply and sanitation - Wikipedia

    en.wikipedia.org/wiki/History_of_water_supply...

    The Ancient Greeks of Athens and Asia Minor also used an indoor plumbing system, used for pressurized showers. [29] The Greek inventor Heron used pressurized piping for fire fighting purposes in the City of Alexandria. [30] An inverted siphon system, along with glass-covered clay pipes, was used for the first time in the palaces of Crete, Greece.

  3. Some of the most common forms of water damage to collections include leaking pipes or roofs, flooded basements, and open windows. These are considered small water emergencies and can be easily contained. Larger water emergencies include natural disasters such as hurricanes, flooding from heavy rains, water discharge at high pressure from fire ...

  4. Classical element - Wikipedia

    en.wikipedia.org/wiki/Classical_element

    The ancient Greek concept of four basic elements, these being earth (γῆ gê), water (ὕδωρ hýdōr), air (ἀήρ aḗr), and fire (πῦρ pŷr), dates from pre-Socratic times and persisted throughout the Middle Ages and into the Early modern period, deeply influencing European thought and culture.

  5. Paradox of value - Wikipedia

    en.wikipedia.org/wiki/Paradox_of_value

    In explaining the diamond-water paradox, marginalists explain that it is not the total usefulness of diamonds or water that determines price, but the usefulness of each unit of water or diamonds. It is true that the total utility of water to people is tremendous because they need it to survive; however, since water is in such large supply in ...

  6. History of salt - Wikipedia

    en.wikipedia.org/wiki/History_of_salt

    Hippocrates encouraged his fellow healers to use salt water to heal various ailments by immersing their patients in sea water. The ancient Greeks continued this, and in 1753, English author and physician Richard Russell published The Uses of Sea Water in which he declared that salt was a "common defence against the corruption of…bodies" and ...

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  8. Spilling salt - Wikipedia

    en.wikipedia.org/wiki/Spilling_salt

    Ancient Egyptians, Greeks, and Romans invoked gods with salt offerings. Some people think this to be the origin of Holy Water in Christianity. [15] In Aztec mythology, Huixtocihuatl was a fertility goddess who presided over salt and salt water. [16] Salt is an auspicious substance in Hinduism and is used in ceremonies like house-warmings and ...

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