Letter from E P Sharpey-Schafer, University of London, Hammersmith Hospital, Ducane Road, Shepherd's Bush London W12, to Henry Barcroft Regarding circulation times in relation to various conditions. Notes that circulation times have been done for most known conditions, but cannot be correlated with output changes. 'Your correspondent would not be doing anything new'. Would like Barcroft's notes on the plethysmograph. See HB/13/8 [November 1946]