Two pipettes, four test tubes and tube stand, unsigned, British, 1950-1953 (see Note). Equipment of the type used by Marguerite S. Pereira et al. in 1953, in the explant method of tissue culture to grow a cold virus at the Common Cold Research Unit, Harvard Hospital, Harnham Down, Wiltshire, England. Two pipettes, four tubes and tube stand, used in tissue culture explant method