A small, but important type of glass, aluminosilicate, contains 20% aluminium oxide (alumina-Al2O3) often including calcium oxide, magnesium oxide and boric oxide in relatively small amounts, but with only very small amounts of soda or potash. It is able to withstand high temperatures and thermal shock and is typically used in combustion tubes, gauge glasses for high-pressure steam boilers, and in halogen-tungsten lamps capable of operating at temperature as high as 750°C.
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Many glass making terms have entered the language: 'Coddswallop': Hiram Codd invented the marble stoppered 'pop' bottle in the 1870s, and millions of the bottles were made, particularly in South Yorkshire. 'Wallop' was the name given to the cheap beer of the day, and beer drinkers dubbed the contents of the codd bottle 'a load of coddswallop'.