(Bey., 65, 1598 (1932)).* Lange and Krueger give, dZ54 1.136. e Submitted by Dr. RC Fuson. f The accuracy of this determination may not be better than* 20% due to instability of the compound and its very low volatility. p Supplied by Dr. Anton B. Burg. The accuracy for this determination is low, probably-10% due to the fact that the compound would occasionally give a smoke which would fail to condense in the weighing trap.* Submitted ...