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The French scale measures and is proportional to the outer diameter of a catheter, with 1 French (Fr) defined as 1 ⁄ 3 millimeter, making the relationship: 1 mm = 3 Fr. Thus, the outer diameter of a catheter in millimeters can be calculated by dividing the French size by 3. [2]
Many pre-metric units were reintroduced, with their old relations to each other, but were redefined in terms of metric units. Thus the aune was defined as 120 centimetres and the toise (fathom) as being two metres, with as before six pied (feet) making up one toise , twelve pouce (inches) making up one pied and twelve lignes making up one pouce .
demi in French means "half": in this case, half a chopine, and – coincidentally – also approximately half a US pint [237 ml]. chopine: 1 ⁄ 2 ~476.1 ml ~1 pint ~0.84 pint pinte: 1 ~952.1 ml ~2.01 pint ~1.68 pint Although etymologically related to the English unit pint, the French pint is about twice as
The substantial benefit of conversion to a more rational and internationally consistent system of measurement has been recognized and promoted by scientists, engineers, businesses and politicians, and has resulted in most of the world adopting a commonly agreed metric system. The French Revolution gave rise to the metric system, and this has ...
The conversion between different SI units for one and the same physical quantity is always through a power of ten. This is why the SI (and metric systems more generally) are called decimal systems of measurement units. [10] The grouping formed by a prefix symbol attached to a unit symbol (e.g. ' km ', ' cm ') constitutes a new inseparable unit ...
The first practical realisation of the metric system came in 1799, during the French Revolution, after the existing system of measures had become impractical for trade, and was replaced by a decimal system based on the kilogram and the metre. The basic units were taken from the natural world.
The ligne is still used by French and Swiss watchmakers. There are 12 lignes to one French inch . The standardized conversion for a ligne is 2.2558291 mm (1 mm = 0.443296 ligne), [4] and it is abbreviated with the letter L or represented by the triple prime, ‴. [5] One ligne is the equivalent of 0.0888 international inch.
French units could refer to any of: Units of measurement in France before the French Revolution, used in France until 1795. Mesures usuelles, used in France until 1839. The International System of Units, the present-day metric system of units. The French catheter scale, used for measuring the diameters of medical catheters.