From 1930. From the Jell-O Museum and Gallery, http://www.jellogallery.org/
Drain pears, reserving ¾ cup of the syrup. Dice pears; set aside. Stir boiling water into Jell-O and salt in medium bowl at least 2 minutes until completely dissolved. Stir in reserved syrup and lemon juice, Pour 1-¼ cups into 8" x 4" loaf pan or 4 -cup mold. Refrigerate about I hour or until set but not firm (should stick finger when touched and should mound).
Meanwhile, stir remaining Jell-O gradually into cream cheese in large bowl with wire whisk until smooth. Stir in pears and cinnamon. Spoon over Jell-O layer in pan. Refrigerate 4 hours or until firm. Unmold. Garnish with cinnamon, if desired.