10 



FARMERS BULLETIN 996. 



afford a convenient attachment for the hose, and it should be held 

 securely in place on the 2 by 4 inch end frame by lock nuts, closing 

 on leather gaskets, as shown in figure 3. 



The pan is placed on the bed, open side down, the hoop iron or 

 angle bar cutting into the ground to form a knife joint, and the 

 steam leaving the boiler under pressure enters the pan and quickly 

 penetrates the soil. 



The iron sterilizing pan which is sometimes used is similar to the 

 wooden pan in shape and size. It has the advantage of lighter 

 weight, making it easier to move. It is made of 16 or 18 gauge gal- 

 vanized iron, sup- 

 ported by ribs of 

 1^-inch angle bars. 

 The pan is made 4 

 inches deep, but 1J 

 inches should be 

 added all around, to 

 jgK be turned in to serve 



f &r 



Jw Slta^ji as a ^ an S e on the 



bottom. To this 

 flange is attached a 

 IJ-inch angle iron, 

 which rests upon the 

 soil, forming the 

 seal when the pan is 

 placed upon the bed. 

 The angle iron also 

 serves as a rib for 

 the lower part of the 

 pan. Other ribs of 

 angle iron are run 

 across the top, two 

 in the middle and 

 one on each edge, holding the pan rigid. A f-inch nipple is firmly 

 secured by flanges and solder in the middle of one end for the hose 

 connection. Ring bolts for lifting are attached by flanges on the 

 sides near the ends of the pan, which is rendered steam tight by 

 close riveting and solder. 



CARRYING OUT THE STEAMING PROCESS. 



The boiler is placed close to the bed and where practicable at an 

 equal distance from each end. Steam traction engines and portable 

 boilers have a marked advantage, because they can be easily moved as 

 the work progresses, allowing the use of a short pipe, giving a 



PI6I3T 



FIG. 3. Nipple inserted in the middle of one end of the 

 frame of the sterilization pan. Note the leather gasket 

 secured under the lock nut to prevent the escape of 

 steam. Another gasket is similarly held by the nipple 

 on the inside. 



