1. Prettre, M., “L'Inflammation et la Combustion Explosive en Milieu Gazeux”, 2me. Partie (Hermann, Paris, 1934); also, Ann. Off. Nat. Comb. Linu., 6, 7, 269 and 533 (1931).
2. Townend, D. T. A., et al., Proc. Roy. Soc., A, 154, 95 (1936).
3. Fenning, R. W., and Cotton, F. T., Aero. Res. Comm., R. and M., 1324 (H.M. Stationery Office, London, 1929).
4. Dixon, H. B., and Harwood, J., Safety in Mines Research Board, Paper No. 93 (1935).
5. Jost, W., Naturwissenschaften, 10, 302 (1936).