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BELL SYSTEM TECHNICAL JOURNAL 



the core truck were not fully up to the temperature of the outer layers, 

 leading to variations ia drying throughout the length. Thus, with 

 the tendency in manufacture toward longer and longer lengths on 

 the core truck, the variations in the degree of dryness under the vac- 

 uum tank process and the advantages of the electrical drying become 

 more pronounced. 



