442 



FOREST PRODUCTS 



Large quantities are also used for heat insulation, either in the form 

 of cork boards or for loose filling in the walls of ice boxes, cold-pipe lines, 

 water coolers, cold storage rooms, and about the sides of freezing tanks 

 in ice factories. Fur storage vaults, creameries, bakeries, candy factories, 

 and breweries use it for insulation and it is extensively used on ships, 

 clubs, hotels, etc., for the same purpose. When used in the board form, 

 the sheets usually measure 12 by 36 in. and vary in thickness, depending 

 upon the local requirements. 



Cork flour is a prominent product. This is made entirely from cork 

 waste and is one of the principal constituents of linoleum and cork floor 

 tiling; cork shavings are used to stuff mattresses and boat cushions. 

 Other common uses are table mats for hot dishes, pin cushions, entomo- 



FIG. 120. Baled cork scraps at a cork factory. Used principally for insulation at refriger- 

 ating plants. 



logical cork for mounting insects, bath mats, washers, penholder tips, 

 carburetor floats, churn lids, cork balls, gaskets, instrument and fishing- 

 rod handles, etc. Recently it has come into greater use for cigarette 

 tips and cork paper from ws to -5^0 of an inch in thickness. 



Spain, the most important country in the exportation of cork and 

 cork products, has an export tariff of five pesetas (roughly, $1.00), per 

 loo km. or 220 Ib. of cork in lumps and sheets. This duty has been the 

 same for a number of years. There is no import duty in the United 

 States for bark, but there is a large duty for manufactured cork, stoppers 

 paying from 12 to 15 cents per pound, depending upon size, while other 

 forms pay about 30 per cent of their value. 



