On February 6, 1840, Hobson, several English residents, and 45 Maori chiefs, signed the Maori text of the Treaty of Waitangi at Waitangi in the Bay of Islands with Hone Heke being the first. total of 512 chiefs, including 13 women, signed the nine copies of the Treaty of Waitangi, mostly the Maori language text, at 34 locations around New Zealand between February 6 and May 21, 1840. Only 39 chiefs signed the English language version at Waikato Heads and at Manukau.
Chimney Dampers. Chimney dampers serve a useful purpose by acting as a doorway that opens and closes your chimney, and your house for that matter, to the outside elements. However most flue dampers that exist in traditional masonry fireplaces are made of cast iron and they aren't the greatest sealing devices.
Knock sensor is located on the engine cylinder block or cylinder head. It works on the principal of Piezoelectricity: when pressure or vibration is applied to piezoelectric material, it changes its shape and vice versa. Engine generates vibration when knocking occurs in the engine.