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The toise (fathom) was defined as exactly two metres and was as before divided into 6 pieds (or "feet") or 72 pouces (inches). The pouce was divided into 12 lignes (or "lines"). The pied and pouce , at precisely 333. 3 mm and 27. 7 mm, were about 2.6% larger than the previous Parisian measures and 9% larger than their English counterparts.
La loi du 4 juillet 1837 (the law of 4 July 1837) of the July Monarchy effectively revoked the use of mesures usuelles by reaffirming the laws of measurement of 1795 and 1799 to be used from 1 May 1840. [1] However, many units of measure, such as the livre, remained in colloquial use for many years and the livre still does to some extent.
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.
≡ 1853.248 m ≡ 1853.248 m pace: ≡ 2.5 ft [4] = 0.762 m palm: ≡ 3 in [4] = 0.0762 m parsec: pc Distant point with a parallax shift of one arc second from a base of one astronomical unit. ≡ 648 000 / π au [10] [11] ≈ 30 856 775 814 913 700 m [12] pica: ≡ 12 points Dependent on point measures. picometre: pm ≡ 1 × 10 −12 ...
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.
~3.799 m 2 ~40.889 sq ft, or ~4.543 sq yd The French square fathom Paris: perche d'arpent carrée: 484 ~51.07 m 2 ~61.08 sq yd This was the main square perch in old French surveying. It is a square 22 pieds du roi on each side. vergée: 12 100 ~1277 m 2 ~1527 sq yd A square 5 perches on each side, or one quarter of an acre. acre, or arpent ...
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 ...
4,046.856422 m 2: square rod perche carrée: 30 + 1 ⁄ 4 sq yd 25.29285264 m 2: square yard yard carré or verge carrée: a superficial area equal to that of a square each side of which measures one yard 8361.2736 cm 2: square foot pied carré: 1 ⁄ 9 sq yd 929.0304 cm 2: square inch pouce carré: 1 ⁄ 144 sq ft 6.4516 cm 2