The candi, of India, is equal to the Venetian ell. In Siam, the ken ia 36 inches nearly, and is divided into 2 auks; these into 2 keuha; and each keub into 12 none, at of an inch.
3 inches is a palm; 3 palma, or 9 inches, a span. 5 feet is a pace. 2 yards is a fathom.
The German mile is the 15th of a degree of latitude, or more than miles Eugli,h.
A league is 3 sea milea. 17 Spanish leaguea is a degree, or about 4 miles, which ie the Dutch and German league. The Persian league. or parasang, ia 30 stadia or furlongs. . The Paris line .0888.
The Paris ell Is 43.9 inches.
The French Wise 6 feet 4.733 inches.
The French league 1.25 of a degree.
Tha French metre 39.37079 inches. The metre is 443.2959 lines, and .513074 of a French toiae. Eight chili ometres ia about 5 miles English. 1,000 feet is nearly 305 metres.
The metre is the ten millionth part ,of the quadrant of the earth from the equator to the north pole. It differs slightly from the length of a pendulum which, in the lati tude of London, vibrates seconda in a vacuum, at the level of the aea, where it is 39.1393 inches; therefore, the metre is only .23 of an inch longer than our pendulum.
The millimetre, or thousandth part, .03937 inches Eng lish.
The centimetre .39371.
The decimetre 3.93708.
The decametre is 10 times the metre.
The hecatometre 100 times.
'I he chiliometre 1,000 times; and the myriametre 10,000 times.
The area is 3.95 English perches: An inch English is 2.54 centimetres; a yard is 0.91438 metres; and a mile is 1609.3149 metres.
The French metre ia the ten millionth of a quadrant ,of the earth, taken as 6217.857 English miles. or 32,809.167 feet, and a mean degree of latitude at 69.0429. A cen tesimal degree ia 54 minutea. A league at 25 to a degree ia 2.7617 miles. A post I ague 2,000 tomes. or 2.3 miles English; a toiae being 6 feet 6% inches English. The
pied one-sixth of the toiae; and the aune 3 feet 11X inches English.
• A degree at the equator is 865,101 feet, or 69.148 miles, or 691-7 nearly. In latitude 66.20 Matipertiva measured a degree of latitude, in 1737, and made it 69.403; and Swan berg. in 1803, made it 69.292. At the equator. in 1744, four astronomers made it 68.732; and Lamhton in lati tude 12, 68 743. Mudge, in England, makes it 69.148. Cassini, in France, in 1718 and 1740, made it 69.12, and Biot 68.769: while a recent measure in Spain makes it but 68.63, leas than at the equator; and contradicts all the others proving the earth to be a prolate spheroid, which was the opinion of Caasini, Bernouilli, Euler, and others, while it has more generally been regarded as an oblate spheroid.
Degrees of longitude are to each other in length, as the cosines of their latitudes. Longitudinal lines run from north to south; latitude from east to west. For every 10° they are as follows: The diameter of the equatorial circle is 41,837,494.8 feet, and its circumference 131,496,444 feet, which, in a sidereal day, gives a velocity of 1,525 feet per second of rotation.
Then 1,525 x 46100 for the velocity of the surface of the whole sphere, which-1-16.08728, the mean force per second, gives 98.132 feet per second for the orbit velocity of the earth; and this multiplied by 31,558,151 seconds in a sidereal year, gives a mean orbit of 586,527,362.6 miles; and a mean radiva, or distance from the earth to the sun, of 93,348,800 miles. The aphelion distance is 94,918.500 miles, and the perihelion 91 '779,000.
The pendulum which vihrstes seconds 39.1393 inches at London, is the standard for the British measures. One mile Is equal to 1618.833 such pendulums.