Combine the first 4 ingredients and then rub them through a sieve. For making white soda bread use 1/2 of the soda mizture to 1 Cup of flour. Then mix as a soft drop dough with sour milk. Pour into a well-greased pan and bake in a 450 oven for 12 minutes. For Brown Soda Bread use 1 cup of whole wheat flour and 1/2 C white flour with 3/4 tsp. of the soda mixture and bake as above.
Hint: When the original knob on your tea kettle lid comes off, use an empty spool cut in two, and fastened with a bolt and nut.