how many chancres will be necessary, but in the case of a young physician, whom he brought forward at the Hospital du Midi, this morning, as a proof of his assertions, he had inoculated upwards of sixty times. He now considered him impregnable, and maintains that his constitutional symptoms, under which he was laboring at the time ho commenced, are entirely eradicated. M. Ricord, with the consent of all parties, this morning inoculated this martyr to science, with pus taken from chancres upon

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... ree different patients in his wards. Upon all three, artificial chancres then existed, proving the quality of the virus. M. Auzias considers his patient as impregnable-timo will prove whether M. Ricord's lancet will be more successful. This constituted the first experiment ever made by M. Ricord in inoculating the human subject with virus taken from another individual-> moral and just views having prevented him from so doing. I need not add, that he fully expects to see a well-established primary chancre following his inoculations, for he denies that any peculiar idiosyncrasy exists, which renders any individual impregnable to syphilitic inoculation. M. Auzias also gives forth, that, in the same way, by repeated inoculations he can render any individual impregnable to syphilis. He inoculates and produces primary chancres until he can produce no more. The patient cannot have secondary symptoms. By what laws this result is brought about, he does not pretend to have yet discovered. M. Auzias and his school have full confidence in what they maintain. Time alone can decide. I feel confident that something new is about to be added to our present knowledge of syphilis. What a glorious discovery, if we find that, by inoculation, we may render the services to the human family, that vaccination has done ! 1 assure you that the excitement and zeal shown here upon tho subject are worthy of the cause.