Glassware for a Dale-Schuster pump Two commercially made joints for use in association with a Dale-Schuster pump; a double perfusion pump used to circulate blood outside the body of an animal, bypassing the heart. One of the two joints has no markings. The second is marked: ‘INTERCHANGE JOINT No. B10 BSS No. 572 BRITISH MADE’. Contained in a contemporary, but repurposed blue cardboard box with various paper labels including: ‘FRAGILE, M.J. RYMAN, London’. With a typed label ‘2 glass parts for Dale-Schuster pump, received from Prof. D.H. [David Henry] Smyth. 30.9.48.’ c.1948