Plate XII. — Showing metbocl of cooling air with cold water. A, curing room; B, 

 duct leading into curing room; C, E, galvanized iron drums, air and water 

 tight; F, thirteen or more 5-inch flues of galvanized iron, 10 ft. long, soldered 

 water tight to drums to cool air; D, main air duct from funnel; G, water pipes 

 from pump; H, overflow pipe; 1, damper in main shaft; J, 4-inch pipe leading 

 from blower to use when there is no wind; K, smokestack of boiler; L, venti- 

 lator from curing room to smokestack; N, boiler. (From Wis. Agr. li}xp. Sta. 

 Bui. 70.) 



