The time here given is for 1 quart jars and fresh products at altitudes up to 1,000 feet above sea level. For higher altitudes increase the time 10 per cent for each additional 500 feet. For example, if the time is given as 120 minutes in the table and your location is 1,500 feet above sea level, the time should be made 132 minutes; for 2,000 feet, 144 minutes.
The time here given is for fresh, sound and firm vegetables. For vegetables which have been gathered over 24 hours increase the time of sterilization by adding one-fifth.
SPECIAL INSTRUCTIONS FOR CANNING VEGETABLES
The addition of 1 level teaspoonful of salt to a jar of vegetables is for quart jars. For pint jar use ½ teaspoonful. For 2 quart jar use 2 teaspoonfuls.
Asparagus
Wash, scrape off scales and tough skin. With a string bind together enough for one jar. Blanch tough ends from 5 to 10 minutes, then turn so that the entire bundle is blanched 5 minutes longer. Cold-dip. Remove string. Pack, with tip ends up. Add 1 teaspoonful of salt and cover with boiling water. Put on rubber top and adjust top bail or screw top on with thumb and little finger. Sterilize 120 minutes in hot-water bath. Remove, complete seal and cool.
Beets
Use only small ones. Wash and cut off all but an inch or two of root and leaves. Blanch 5 minutes, cold-dip and scrape off skin and stems. They may be packed in jar sliced or whole. Add 1 teaspoonful of salt and cover with boiling water. Put on rubber and top and adjust top bail or screw top on with thumb and little finger. Sterilize 90 minutes in hot-water bath. Remove, complete seal and cool.