The Marcus Beck Laboratory reports

1. -- The cultivation of human tumour tissue in vitro, by David Thomson and John Gordon Thomson ; 2. -- Some further researches on the cultivation of tissues in vitro, by David Thomson ; 3. -- Some researches on spirochætes occurring in the alimentary tract of man and some of the lower animals, by John Gordon Thomson and David Thomson ; 4. -- Controlled growth en masse (somatic growth) of embryonic chick tissue in vitro, by David Thomson ; 5. -- Soem observations on the development of red blood cells as seen during the growth of embryonic chick tissue in vitro, by David Thomson