Anaphylaxis

very striking phenomenon to which Richet first gave the name of anaphylaxis has been viewed from all sides, but we still are not clear as to its causation, though we have accumulated much real knowledge regarding anaphylaxis and antianaphylaxis, since the day when Richet and Portier discovered that, although a certain quantity of the extract of Actinia tentacles had no effect on a normal dog when injected intravenously, it was able to kill a dog that had received a small dose of the extract some days before; and since the day when Arthus found that rabbits, which had received at several days' intervals subcutaneous injections of horse-serum, always developed infiltration at the site of the