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Recently there has been a great surge of interest in almost-exact sum rules for the magnetic moments of nucleons. (By almost-exact we mean: exact to all orders in the strong couplings but only the lowest order in electromagnetic and weak couplings.) Besides providing a means for calculation of the magnetic moments on the same level as the calculation of GA/GV by Adler and Weisberger these sum rules, taken together with the Adler-Weisberger sum rule, constitute a useful tool for investigating the nature of the dynamical approximations that underlie higher symmetry schemes.

There is no evidence to suggest that the adrenal medulla plays a significant role in the production or maintenance of renal hypertension. The decisive experiment was made by Goldblatt and collaborators/who successfully produced experimental hypertension in dogs by renal artery constriction despite the surgical removal of·one entire adrenal and the medulla of the other.