volved in the calculation reveals that while they are large, they could not, without the greatest difficulty, be stretched to explain so large a discrepancy. 98, A similar calculation on the data from references 3 and 4 indicates that, if a dineutron were stable, 10 for bismuth, a(8,y)<10r™ cm 2 ; for helium, a(8,y) <5X 10~2 8 cm 2 .9a Note added in proof:-It has recently been found pB. L. Cohen and T. H. Handley, "Experimental Studies of (p,l) Reactions," Phys. Rev. (to be published)]] that the statistical theory successfully predicts the cross sections for (p,t) reactions occurring by compound nucleus interaction in iron and palladium. Since the uncertainties in these calculations are very similar to those in the dineutron calculation (the thresholds are about the same), the dineutron calculation is probably not in error by as much as a factor of ten. 10 The statistical theory does not predict (5,7) cross sections, so the results of the calculation are given in terms of