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Of sixty pigs in which the tonsils, mesenteric lymph nodes, caecal contents, liver and bile, urinary bladder and bone marrow were examined for the presence of Salmonella, thirty-six (60 per cent) were found to be positive. The results were as follows: tonsils alone one, mesenteric lymph nodes alone five, tonsils plus mesenteric lymph nodes two, mesenteric lymph nodes plus caecal contents seven, tonsils plus caecal contents six, tonsils plus mesenteric lymph nodes plus caecal contents six, caecal contents plus liver and bile one, mesenteric lymph nodes plus caecal contents plus liver and bile one. Salmonella was not found to be present in the urinary bladder and bone marrow. It is oncluded that in the manufacture of "meat" (muscular tissue obtained by scraping bones), the bone marrow fraction does not contribute to contamination of this meat with Salmonella. Of the total number of seventy-eight strains isolated, fifty-two were of the sero-type S. typhimurium (66 2/3 per cent).

The faeces, mesenteric lymph glands, and intestinal wall (Peyer's patches) of two hundred clinically normal pig carcases were examined. Of these, 115 (57.5%) were found to infected with Salmonella in the following combinations: lymph glands only, 6; intestines only, 14; faeces only, 13; lymph glands + intestines, 7; lymph glands + faeces, 11; intestines + faeces, 20; lymph glands + intestines + faeces, 44. The supposition that Salmonella can be detected in the lymphoid tissue of the intestine (Peyer's patches) far more frequently than in the faeces was not confirmed. The presumably still rising number of clinically healthy butcher's pig which are actually infected with Salmonella is pointed out.