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 shall have to test one organ after another, until we meet with one against which defensive ferments are to be found. The exact study of the so-called nutritive disturbances of the suckling will, from this point of view, be of much interest.

Moreover, we shall certainly be in a position to determine experimentally, as well as by means of clinical observations, the best method of attacking certain poisons, such as lead, nicotine, alcohol (methyl, ethyl, &c.), ether, chloroform, morphia, &c. We shall be able to delimit primary and secondary injuries, and to shed new light upon many problems of toxicology and pharmacology.

In conclusion, we should like to summarize the researches which have been published since the appearance of the first edition of this book. We ourselves have at our disposal more than 500 cases of differential diagnosis between pregnancy and non-pregnancy. In these cases complications of all kinds were present, salpingitis, carcinoma, myoma, parametritis, tuberculosis, &c. With the exception of one uncertain case of probable abortion, no mistakes have been made in our diagnosis. In addition, forty-two cases of carcinoma have been investigated. The serum of carcinomatous patients decomposed similar carcinomatous tissues after boiling, but never tissues of placenta.

We ought to point out here, that we must never