1. Taylor and Tobolsky, J. Amer. Chem. Soc., 67, 2063 (1945).
2. Tobolsky and Mesrobian, J. Amer. Chem. Soc., 67, 785 (1945); J. Polymer Sci., 2, 463 (1946); Tobolsky and Blatz, J. Phys. Coll. Chem., 49, 77 (1945).
3. Grassie and Melville, Trans. Faraday Soc., contribution to discussion on "Labile Molecule" held in September 1947.
4. Details will be published elsewhere.
5. The ceiling temperature phenomenon in the copolymerization of sulphur dioxide and olefines was discovered in 1938 by Snow and Frey7. The cause was then unknown.