AT the annual general meeting of the Lister Institute, held on June 2, the Governing Body presented the Institute's forty-third annual report. The report contains an interesting summary of the research work done during the year. Respecting viruses, a team of workers has continued the study of a possible virus agent in the causation of acute rheumatism and rheumatic diseases, Dr. Salaman has continued his investigation of the antigenic structure of vaccinia virus, and Sir John Ledingham has studied the peculiar relationship that exists between the filterable viruses of rabbit myxomatosis and rabbit fibroma. Dr. Felix and Miss Pitt have continued their investigations on the antigenic constitution of the typhoid bacillus, and on the virulence and immunizing properties of bacteria. Much work has also been carried out on vitamins and nutrition, and Prof. Robison has continued his studies on calcification. The two Svedberg ultracentrifuges, provided by a grant from the Rockefeller Foundation, have proved satisfactory, and have been used in the investigation of virus bodies and of proteins. The National Collection of Type Cultures, housed at the Institute, has distributed during the year some 5,000 cultures, and 200 new strains of microorganisms have been added to the Collection.