HOME CANNING 267 



TEMPERATURE FOR BOILING WATER AT 

 DIFFERENT ALTITUDES 



Water boils at sea level at 212 Fahrenheit. As the alti- 

 tude increases, the degree at which water will boil gradually 

 decreases. The following table is intended as a guide to de- 

 termine the increase of time required for the sterilization 

 of food stuffs in the canning process : 



500 feet above sea level, 211 degrees Fahrenheit. 

 1,000 feet above sea level, 210 degrees Fahrenheit. 

 2,000 feet above sea level, 208 degrees Fahrenheit. 

 3,000 feet above sea level, 206 degrees Fahrenheit. 

 4,000 feet above sea level, 204 plus degrees Fahrenheit. 

 5,000 feet above sea level, 202 plus degrees Fahrenheit. 

 6,000 feet above sea level, 201 plus degrees Fahrenheit. 

 7,000 feet above sea level, 199 plus degrees Fahrenheit. 



The time table given in these instructions will be based 

 upon the first altitude given, five hundred feet above sea 

 level. For every four thousand feet increase in altitude it 

 will be well to add twenty-fiVe per cent, to the time require- 

 ments given in the recipes or time schedule for the canning 

 of all kinds of fruits, vegetables, greens, meats and soups. 



CONTAINERS 



Glass Jars. For home use it is conceded by most 

 women that glass jars are the most desirable and economical 

 for home canning, as they can be used from year to year, 

 or indefinitely, by simply adding new rubbers and caps each 

 year. Practically all of the various types of glass jars avail- 

 able on the market can be used successfully in the canning 

 of all kinds of fruits, vegetables, meats and soups by the 

 "cold-pack method" outlined in these instructions. 



In the handling of all glass top jars, with the top and 

 clamp springs, it is important to remember that the rubbers, 



