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finger at the base of Tarzan’s skull, "there lies, as you know, a small, oval, reddish gray body containing a liquid which influences the growth of tissues and organs. It long ago occurred to me that interference with the normal functioning of this gland would alter the growth of the subject to which it belonged. I experimented with small rodents and achieved remarkable results; but the thing I wished to accomplish, the increase of man’s stature I have been unable to achieve. I have tried many methods and some day I shall discover the right one. I think I am on the right track, and that it is merely now a matter of ex­perimentation. You know that stroking your face lightly with a smooth bit of stone produces a pleasurable sensation. Apply the same stone to the same face in the same manner, but with great­ly increased force and you produce a diametrical­ly opposite sensation. Rub the stone slowly across the face and back again many times, and then repeat the same motion rapidly for the same number of times and you will discover that the results are quite different. I am that close to a solution; I have the correct method but not quite, as yet, the correct application. I can reduce crea­tures in size, but I cannot enlarge them; and al­though I can reduce them with great ease, I can­not determine the period or endurance of their reduction. In some cases, subjects have not re­gained their normal size under thirty-nine moons,