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205-210 dec. (C4HI0NBr)n 52.63 52.56 CiHs 10 31-32 2 7.0 195-199 (C6H12NBr)" 48.19 47.00 »-C,H, 8 37-38 3 1 (C6H,4NBr)" 44.44 43.31 ft-C4H9 5.2 3.6 100-120 (C6H,«NBr)" 41.23 41.33 t-CjHg 6.4 4.4 (CrHuNBr), 41.23 41.30 precipitated with dry ether, the total bromine remained approximately constant at 51.96%, but the bromide ion fell to 43.38%. Further attempts to purify the mixture did not lead to any definite product.A sample of the free polymeric tertiary amine was prepared from the polymeric salt obtained from 7-bromopropylmethylamine. The salt used in this experiment contained 50.3% bromine, and 49.07% bromide ion. A solution of 5 g. of this salt in water was treated with an excess of silver oxide, and then the solution was filtered. The

rays and the inactive product which finally produces radium; the second, much slower change, giving -rays and actinium, thus: /(?)»->Ra »-etc.