BKITISH AND METKIC UNITS. 389 



Units of weight. 



1 gramme = 15*43235 grains 0'035274 ounce Avoirdupois. 



1 kilogram = 35*2739 ounces Avoirdupois = 32-1507 ounces 

 Troy = 2-2046 pounds Avoirdupois. 



1 metric tonne = 1000 kilos = 2204-621 pounds Avoirdupois. 



= 0-98420 ton. 

 Or 1 ounce Avoirdupois = 28-3495 grammes 



1 ounce Troy = 31-1035 



1 pound Avoirdupois = 453*593 ,, 



1 hundredweight = 50-802 kilograms 



1 ton = 1016-05 



On the Continent, crop yields or manurial dressings are 

 frequently expressed in kilograms per hectare ; in England, in 

 pounds or tons per acre. The following connection between 

 the two systems may therefore be found useful : 



To convert kilograms per hectare into pounds per acre 

 multiply by 0-89222. 



To convert pounds per acre into kilograms per hectare 

 multiply by 1-1208. 



To convert kilograms per hectare into tons per acre multiply 

 by 0-0003984. 



To convert tons per acre into kilograms per hectare multiply 

 by 2510-9. 



