﻿8 BULLETIN 1136, U. S. DEPABTMfeffT OF AGRICULTURE. 



ffETUPN BEND CO/L 



VE/7T/CAL /7ETU/PA/ GEA'£> //EADE/P CO/L 



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FlG. 2. — ripe coils used for heating dry lulus. These are designed to provide for the 

 expansion and contraction of the individual pipes and for the free flow of the con- 

 densed steam to the drain end. The wall coil may also be used as a horizontal coil, 

 called " Z " coil. 



