THE bromination of 4-methylglyoxaline (IV) has been shown (Pyman, T., 1910, 97, 1814) to lead to the formation of 2: 5-dibromo-4-methylglyoxaline (X) together with 2 (or 5)-bromo-4- methylglyoxaline, in which the position of the bromine atom was undetermined. It is now
