A method for estimating urinary corticosteroid patterns is described. Normal 24-hour excretion values for tetrahydrocortisol (THF), allo-tetrahydrocortisol (allo-THF), tetrahydrocortisone (THE), cortisone (E), cortisol (F), tetrahydro-11-deoxycortisol (THS), tetrahydrocorticosterone (THB), allotetrahydrocorticosterone (allo-THB), tetrahydro-11-dehydrocorticosterone (THA), 11-dehydrocorticosterone (A), corticosterone (B) and aldosterone, as well as some calculated ratios are reported. The α-ketolic tetrahydrometabolites of cortisol include 25 per cent THF, 10 per cent allo-THF and 65 per cent THE. The mean THF/THE-ratio is 0.4, the mean F/E-ratio 0.8. The α-ketolic tetrahydrometabolites of corticosterone include 35 per cent THB, 35 per cent allo-THB and 30 per cent THA. The mean THB/THA-ratio is 1.2, the mean B/A-ratio 2.0. These figures seem to indicate that conversion of corticosterone to its 11-dehydrometabolites (B → A → THA) is less important than the corresponding metabolic pathway for cortisol (F →E →THE). Assuming that excretion reflects secretion, it is calculated that the adrenals secrete about 7 times as much cortisol as corticosterone and that about 1–3 per cent of the cortisol precursor Reichstein's S is secreted before 17-hydroxylation has been accomplished.

The absolute value of the spin susceptibility of the radical-ion salt Li+TCNQ (tetracyanoquinodimethan) has been accurately measured in the temperature range «100-4SO 'K. It is shown that the magnitude and temperature dependence of the susceptibility can be quantitatively explained on the basis of an elementary symmetry-split band theory for a linear system. The splitting is due to the "dimerization" along the chain of TCNQ ions. The resulting values for bandwidths and band gap {0. 055 and 0.135 eV, respectively) are in fair agreement with the values obtained from a tight-binding band-theory calculation on Rb TCNQ, for which the crystal structure is accurately known.The experimental results are also compared with other theoretical calculations. The results show band theory to be considerably superior in this particular case.

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