Instructions
Combine sugar, 5% white vinegar, water, and cinnamon. Tie cloves and allspice in a clean thin cloth, add, bring to a boil, cover, and simmer about 30 minutes.
Wash and peel pears and remove blossom ends. Stems may remain. Halve or quarter large pears. Hold peeled fruit in 1/2 teaspoon ascorbic acid per 2 quarts water, then drain.
Add drained pears to hot syrup, bring to a boil, reduce heat, and simmer 20 to 25 minutes.
Pack hot pears into hot pint jars, adding one 2-inch cinnamon piece per jar. Cover with boiling syrup, leaving 1/2-inch headspace. Remove bubbles, adjust, wipe rims, and apply lids.
Process pints for 20 minutes at 0–1,000 ft, 25 minutes at 1,001–3,000 ft, 30 minutes at 3,001–6,000 ft, or 35 minutes above 6,000 ft.