ABSTRACT
In practice, each linear array of 48 dispensers is fed by a common supply line at fixed pressure that, in turn, is connected to a single large-volume bottle of one reagent (Fig. 10). Assays are constructed using multiple linear arrays, each supplied with a different reagent. An assay is staged by sequential visits of each well to the dispensing position
under each orifice serving a column of wells. Thus, each linear array dispenses a reagent to each of the 48 wells in a column at a time.
