The Winter Food Supply 243 



high altitudes, however, a steam-pressure canner, or 

 aluminum pressure cooker is recommended to be used. 

 This type of canner produces a temperature up to 250 

 F. at 15 Ibs. pressure, insuring proper sterilization, and 

 also saving time and fuel. A steam pressure canner 

 may be bought around $20. Several families may use 

 one and divide the cost. 



In using the pressure canners and aluminum cookers 

 the following formula is given : 



1. Have water in the canner up to the false bottom, 

 but not above it. Keep this water boiling during the 

 time that packed jars are being placed in the canner, 

 and add water occasionally to prevent its boiling dry. 



2. To prepare product follow instructions as here- 

 inafter given. As each jar is packed, set it at once, 

 partially sealed, in the canner. The cover of the canner 

 may be put in position, but not clamped. 



3. When all of the filled jars are placed in the canner, 

 put on the cover and fasten opposite clamps moderately 

 tight ; then tighten each pair of clamps fully. 



4. The petcock should be left open until live steam 

 escapes from it. The canner should be steam-tight, 

 and no steam should escape except through the open 

 petcock. When live steam escapes, close the petcock 

 completely. 



5. Begin to count time when the steam gauge regis- 

 ters the required temperature. 



6. Maintain a uniform pressure during the sterilizing 

 period by setting the weight on the arm, when the 

 proper pressure is registered on the steam gauge, so 

 that surplus steam will escape at that desired pressure. 



