Sterilize jars and lids in boiling water for at least 10 minutes. Let simmer while making jam.
In a large saucepan, combine pears, water, and lemon juice. Cover, and simmer for 10 minutes. Stir in pectin, and bring to a full boil. Stir in the white sugar, and continue boiling and stirring uncovered for 1 minute, until sugar is dissolved. Remove from heat, and stir in brown sugar, allspice, and nutmeg.
Quickly fill jars to within 1/2 inch of the top. Wipe rims clean, and top with lids. Process jars in boiling water for 10 minutes to seal.
