METRIC SYSTEM OF WEIGHTS AND MEASURES. 181 



MEASUREMENT OF ANGLES. 



In the centesimal or French method the right angle is 

 divided into 100 equal parts called grades, the grade into 

 100 equal parts called minutes, the minute into 100 equal 

 parts called seconds. 



TABLE. 



100 seconds (") = 1 minute (') 



100 minutes = 1 grade (gr.) 



100 grades 1 right angle (r. a.) 



NOTE. Since the signs for both the common and centesi- 

 mal methods are the same, to prevent confusion when min- 

 utes and seconds are expressed in the centesimal method, 

 annex the abbreviation cen. ; thus, 3' 46" cen. 



CURRENCY. 

 SCALE. TABLE. 



m CD ' r ~ 



<j 2 g g 10 millimes = 1 centime. 



| - s 10 centimes = 1 decime. 



t*; r g ' 10 decimes = 1 Franc. 



o. o o o 



LINEAR MEASURE. 



Table* of equivalents. 



1 in. =: 25 mm. (nearly). 

 1 ft. = 305 mm. (nearly). 



1 yd. = 914 mm. 

 1 rd. = 5029 mm. 



1 mi. = 1609.35 m. 



1 cm. = .3937=f in. (nearly). 



1 m. = 39.3*7 in. = 1.093 yd. 



1 km. = .62137 mi. = 198 rd., 12 ft., 



10 in. 

 Authorized by Act of Congress, July 27, 1866. 



