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FERTILIZATION AND THE PRODUCTION OF SEX.

JAMA. 1904;XLII(3):178. doi:10.1001/jama.1904.02490480040010.
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The production of sex was recently discussed editorially1 and some recent studies of the subject noticed. Still another memoir bearing on the subject is that of Schuecking2 which, however, covers a wider biologic range of study and includes a consideration of the essentials of fertilization as they occur both in the lower organisms and in the human species. A certain portion of Schuecking's experiments on the artificial fertilization of certain marine organisms was noticed in a former issue3 of The Journal, but more recently he has published some interesting and perhaps important deductions. He finds that the taking up of water is a preliminary essential for both artificial fertilization and parthenogenesis and that fertilization is more certain the larger the number of spermatozoa. It is rather incomprehensible why so large a number should be required—some two or three hundred millions—when but a single one is sufficient for

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