ARTS AND MANUFACTURES. 1D 
The white of egg is also used in making court 
plaster; the luster of morocco leather is restored 
by it; gold leaf is applied to leather by its aid, 
and grease is removed from leather by one or 
two applications. 
The yolk is used to render oils diffusible in 
water; from it Russia, a valuable oil, is ex- 
tracted, which is used in manufacture of the 
Kazan soap. Before the discovery of oil colors, 
the yolk was used by painters, as in the Chapter 
House at Westminster. 
In the preparation of the finest leather the 
yolks are used, the oil giving to kid the soft- 
ness so esteemed in gloves, one egg being used 
for each skin. 
That the value of eggs for clarifying various 
substances has long been known is shown by 
one entry, in the year 1350, in the household 
books of the French court, of eggs to clarify 
sugar. At the present time in France, wine 
clarifiers use eighty million annually. 
There is a legitimate use for bad eggs, though 
the natural association of ideas connect them 
