Birch, McDonald. McDonald Birch?s Multiplying Chairs. Los Angeles: F.G. Thayer, ca. 1938. A wooden chair with patterned fabric seat suddenly, quickly, and magically, becomes two matching chairs. 35 ?? high. Owned and used by McDonald Birch in his annual country-crossing tours. Larger chair showing wear; inner chair very good. Rare. As performed in the Birch show, the magician sat on a wooden chair at center stage, as a boy from the audience walked up to him to assist. Birch offered the boy a seat, but there was only one chair present. So the magician stood up, and suddenly, where one chair was, now there were two ? the chair having multiplied by magic. Finely made in the Thayer style, this illusion is a truly scarce item from the fabled California illusion factory.