I42 THE PROSPECTORS HANDBOOK. 



Measures of Weight. 



Troy Measure 



(by which gold, silver, platinum, and precious stones arc 

 weighed, though diamonds are by the carat (150 carats 

 = 480 grains). 



24 grains = i pennyweight. 



20 pennyweights = i ounce ( 480 grains). 



12 ounces = i pound (5760 grains). 



Avoirdupois Weight 

 1 6 drams 

 1 6 ounces 

 14 pounds 



2 stone 



4 quarters 

 20 hundredweight 



ounce (437 grains). 



pound (7000 grains). 



stone. 



quarter. 



hundredweight (112 Ibs.). 



ton (2240 Ibs.). 



A cubic foot of water = nearly 1000 ounces. 

 Av. oz. = 437^ grains. i gallon of water = 10 Ibs. 

 Troy oz. = 480 grains. 



FRENCH. 



Measures of Length. 



Millimetre ( T ^Vff of a metre) = "03937 inches. 

 Centimetre ( T ^ ) = -3937 

 Decimetre (iV ) = 3*937 



Metre (unit of length) = 39-3708 ins. or 3-2809 ft. 



Decametre (10 metres) = 32*809 ft. or 10-9363 yus. 

 Hectometre (100 metres) 109-3633 yards. 

 Kilometre (1000 metres) = 1093-63 yds. or -6138 miles 

 Myriametre ( i oooo metres) = 6-2138 miles). 



Measures of Surface. 

 Centiare ( T ^ of an are or sq. metre) = 1-1960 sq. yds. 



Are (unit of surface) { = ' I 9 >6 33 sq. yds. 



( or '0247 acres. 



Decare (10 ares) J -_= 1 1 9 6 '33 sq. yds. 



or '2474 acres. 



Hectare (roo ares) = "o'tt S 1 



or 2*4736 acres. 



