Removal of an Apparent Discrepancy between Calculations of Dyson and of Oguchi for the Heisenberg Ferromagnet

An apparent discrepancy between the published results of Dyson and of Oguchi for the coefficient of the $T^4$ term in the low-temperature magnetization of a simple cubic ferromagnet is shown to result from the different numerical approximations used by these authors. The coefficient correct to 5 figures is shown to include a factor {$1+\frac{0.29562}{S}+0\left(\frac{1}{S^2}\right)+\cdots$}.