This section is from the book "The Boy Mechanic Vol. 2 1000 Things for Boys to Do", by Popular Mechanics Co.. Also available from Amazon: The Boy Mechanic, Vol2: 1000 Things for Boys to Do.
A good method to bleach ivory ornaments is to rub on a solution made of a small quantity of unslaked lime, bran and water. The mixture should be wiped off after the ivory has become sufficiently bleached, and the surface then rubbed with sawdust or magnesia, which gives it a brilliant polish.
 
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