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Exceptions are made if the unit is commonly known by another name (for example, ... long cwt or cwt ≡ 112 lb av = 50.802 345 44 kg: hundredweight (short); cental:
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Norman statutes made the London bushel part of the legal measure of English wine, ale, and grains. The Assize of Bread and Ale credited to Henry III , c. 1266 , defined this bushel in terms of the wine gallon , [ 2 ] while the c. 1300 Assize of Weights and Measures usually credited to Edward I or II defined the London bushel in terms of the ...
A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z). [ 1 ] The definitive visualisation of all 118 elements is the periodic table of the elements , whose history along the principles of the periodic law was one of the founding ...
The hundredweight has had many values. In England in around 1300, different hundreds (centum in Medieval Latin) were defined. The Weights and Measures Act 1835 formally established the present imperial hundredweight of 112 pounds (50.80 kg). The United States and Canada came to use the term "hundredweight" to refer to a unit of 100 pounds (45.
Salt/common salt – a mineral, sodium chloride, NaCl, formed by evaporating seawater (impure form). Salt of tartar – potassium carbonate; also called potash. Salt of hartshorn/sal volatile – ammonium carbonate formed by distilling bones and horns. Tin salt – hydrated stannous chloride; see also spiritus fumans, another chloride of tin.
The abundance of the chemical elements is a measure of the occurrences of the chemical elements relative to all other elements in a given environment. Abundance is measured in one of three ways: by mass fraction (in commercial contexts often called weight fraction), by mole fraction (fraction of atoms by numerical count, or sometimes fraction of molecules in gases), or by volume fraction.
The quintal or centner is a historical unit of mass in many countries which is usually defined as 100 base units, such as pounds or kilograms. [1] It is a traditional unit of weight in France, Portugal, and Spain and their former colonies.