Plate 
) re 

CURING 


ROO 



SVB EARTH DUCT 

ENGINE 


FPOOM 

XII,—Showing method of cooling air with cold water. A, curing room; B, 
duct leading into curing room; ©, EH, galvanized.iron drums, air and water 
tight; F, thirteen or more 5-inech 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; I, damper in main shaft; J, 4inch 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. Exp. Sta. 
Bul. 70) 
