The advantages of the Seligson pipette in a clinical laboratory are well known (Seligson, 1957; Saifer, Gerstenfeld, and Zymaris, 1958). It is usually attached to a burette for adding diluent. Mather (1960) modifies the stopcock of the pipette and attaches it to an automatic burette. In this laboratory, two devices have proved satisfactory in over two years' continuous service. (1) A 0.35 ml. S...