274 BUTTER-MAKING. 
exposed. The tubs should be well filled. Any open spaces 
left in the butter permit the circulation of air, and the butter 
is more likely to absorb the woody odors from the tub. 
Open. 
Folded. 
Fic. 160.—The Eureka butter- Fic. 161.—Butter cartons. 
printer. 
In the preparation of the tubs, many of these woody odors 
are eliminated, but it is impossible to remove all of them. The 
heat when applied to the tub opens up the pores of the wood 
and causes the volatile woody odors to pass off with the escaping 
steam. When the wood is removed from the influence of the 
steam, the pores again close, or contract, and in that way most 
of the woody odors are removed, at least from the inner surface 
of the tub. The remaining woody odors should not be allowed 
to circulate inwardly through the butter by allowing empty 
spaces inside the tub. The top surface of the butter can 
be made to appear smooth and full by filling the tub a little 
more than full of butter, and then cutting the excessive amount 
of butter off with a string. The extra butter can then be rolled 
off, and the top appear perfectly smooth and full. 
