1. Private communication;Barr, H.
2. Bauer, F., Arch. f. exp. Path. Pharmakol., Berlin, 1931, CXLI, 400.
3. Bennett, T. I., Hunter, D., & Vaughan, J. M., Quart. J. Med., Oxford, 1932, I
4. Blauberg, M., quoted by Mackay, H. M. M., Med. Res. Counc., Spec. Rep. Ser. No. 157, London, 1931, 13.
5. Bray, G. W., Quart. J. Med., Oxford, 1930-31, XXIV, 181.