Wipe, stem, peal and core pears. Cut in small pieces. Mix pears, pineapple and orange (juice and rind) together. Measure. For each 4 cups fruit mix, add 3 cups sugar. Cover and let stand overnight. Simmer until thick (about 2 hours). Add cherries (cutting them in half). Stir well. Process for 10 minutes in boiling water bath. Makes eight 6 oz. Jars.