APPLYING LIME 



distribution. When it is fully exposed to the air 

 or moisture, it slakes and doubles in volume. 



Hydrated lime, often called slaked lime, is a com- 

 bination of stone-lime and water. The water causes 

 an increase in weight of 32 per cent, 56 pounds 

 of stone-lime becoming 74 pounds of the hydrate. 



Pulverized limestone, often called carbonate 

 of lime, is the unburned limestone made fine so 

 that good distribution may be possible. 



Air-slaked lime, often called carbonate of lime, 

 is stone-lime or hydrated lime combined with 

 carbonic acid from the air, and thereby increased 

 in weight. Fifty-six pounds of stone-lime, or 74 

 pounds of hydrated lime, become 100 pounds of 

 air-slaked lime. 



Agricultural lime, or land-lime, may embrace 

 anything that the manufacturer of lime chooses to 

 market. It may be reasonably pure unslaked 

 lime, or it may have less value than a finely 

 pulverized pure limestone. There is a custom of 

 grinding the core, or partially burned limestone of 

 the kiln, together with impurities removed from 

 builders' lime, and with this may be put some air- 

 slaked lime. Some manufacturers market under 

 this name a lime of excellent value. There is no 

 standard, and one should not pay more than a 



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