NUMBERS AND .MEASURES, 11, 



(12) MEASURES OF MASS.. 



English. 



A rouxp is .the mass of a certain piece of platinum deposited with 

 the Board of Trade. 



1 grain avoirdupois and troy. 

 437 '5 gr. = 1 ounce avoirdupois (oz.) 

 7000 gr. = 16 oz. = 1 POUND avoirdupois (Ib.) 

 784000 gr. = 1792 oz. = 112 Ib. = 1 hundredweight (cwt.) 

 15680000 gr. = 35840 oz. = 2240 Ib. = 20 cwt. = 1 ton. 



100 Ib. = 1 cental. 

 480 grains = 1 ounce troy. 

 5760 gr. = 12 oz. troy = 1 pound troy. 

 1 oz. troy = 1-097 oz. avoirdupois. 

 1 Ib. avoirdupois = 1'215 Ib. troy. 

 1 ton of water contains 224 gallons or 35 '9 cubic feet. 



Metric. 



The KILOGRAM is the mass of a piece of platinum at Paris known 

 as the Kilogramme des Archives. 



1 milligram (mgm.). 

 10 ingm. = 1 centigram (cgm.). 

 100 mgm. = 10 cgm. = 1 decigram (dgm.). 

 1000 mgm. = 100 cgm. = 10 dgm. = 1 gram (gm.). 



1000 gm. = 1 KILOGRAM (kilog.). 

 1000000 gm. = 1000 kilog. = 1 tonne. 



Conversion Table. 



Miller in 1856 found the Kilogramme des Archives to be equal to 

 15432-349 grains. 



1 grain ._ 0'0648 gm. 



1 oz. avoir 28 '35 gm. 



1 oz. troy 31-1035 gm. 



lib 453-593 gm. 



1 cwt 50'8 kilog. 



1 ton 1016-05 kilog. 



Igram 15'432 gr. 



1 kilog 2-20461b. 



1 tonne 0*9842 ton. 



