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During the early part of the twentieth century, the French introduced their own units of power – the poncelet, which was defined as being the power required to raise a mass of 100 kg against standard gravity with a velocity of 1 m/s, giving a value of 980.665 W. [16] [17] However, many other European countries defined their units of power ...
The term for telescopes persisted even in the 20th century, with a telescope listed in the 1909 Sears Roebuck catalog of having 25 lignes diameter aperture, or about 56 mm (5.6 cm). [5] The measurement SPI (Stitches per inch) for leather pricking irons and stitch marking wheels also commonly uses the Paris inch instead of the Imperial 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. This is comparable in size to the British measurement called "line" (one-twelfth of an English inch), used prior to ...
pouce: 1 ⁄ 12: 27.07 mm 1.066 in 1 ⁄ 12 of a pied du roi. This corresponds to the inch, a traditional English unit. pied du roi: 1 32.48 cm 1.066 ft Commonly abbreviated to pied, this corresponds to the foot, a traditional English unit. Known in English as the Paris foot (properly a separate, shorter unit), the royal foot, or French foot ...
Conversion of units is the conversion of the unit of measurement in which a quantity is expressed, typically through a multiplicative conversion factor that changes the unit without changing the quantity. This is also often loosely taken to include replacement of a quantity with a corresponding quantity that describes the same physical property.
The unit was invented by French shoemakers in the early 1800s. [1] Its origin probably lies in 2 ⁄ 3 centimetre being very close to 1 ⁄ 4 inch; a French inch pouce-roi is around 27 mm, a quarter of that is 6.7 mm, close to 6. 6 mm defined for the Paris point.
The Russian liniya (ли́ния), 1 ⁄ 10 of the diuym which had been set precisely equal to an English inch by Peter the Great [13] The French ligne or "Paris line", 1 ⁄ 12 of the French inch (French: pouce), 2.256 mm and about 1.06 L. The Portuguese linha, 1 ⁄ 12 of the Portuguese inch or 12 "points" (pontos) or 2.29 mm
≡ 1 ft/min = 5.08 × 10 −3 m/s: foot per second: fps ≡ 1 ft/s = 3.048 × 10 −1 m/s: furlong per fortnight: ≡ furlong/fortnight ≈ 1.663 095 × 10 −4 m/s: inch per hour: iph ≡ 1 in/h = 7.0 5 × 10 −6 m/s inch per minute: ipm ≡ 1 in/min = 4.2 3 × 10 −4 m/s inch per second: ips ≡ 1 in/s = 2.54 × 10 −2 m/s: kilometre per ...