Canning method
Pour boiling water over jar lids in small kettle. Sterilize jars. Discard stems, quarter and crush strawberries. Measure 2 cups crushed strawberries. Finely chop sectioned peeled oranges. (Do not include any orange membranes or white pith.) Measure 1 1/2 cups orange pulp.
Combine strawberries, orange pulp, lemon juice, pectin, butter and "Mrs. Wages Fresh Fruit Preserver" in saucepot. Bring to a boil. Add sugar and return to a full rolling boil for one minute. Remove from heat. Skim off any foam. Let rest for 3 minutes, stirring occasionally.
Ladle into jars leaving 1/4-inch headspace. Adjust two-piece caps. Process jars for 10 minutes in hot water bath (USDA Guidelines).
Processing: As published by Mrs. Wages: "Process jars for 10 minutes" (boiling water bath canner) - 10 minutes.