An automated immunostaining apparatus having a reagent application zone
and a reagent supply zone. The apparatus has a carousel slide support
supporting a plurality of slide supports thereon, and drive means
engaging the carousel slide support for consecutively positioning each of
a plurality of slide supports in the reagent application zone. The
apparatus also has a carousel reagent support having a plurality of
reagent container supports thereon, and drive means engaging the carousel
for rotating the carousel and positioning a preselected reagent container
support in the reagent supply zone. The apparatus also has a reagent
delivery actuator means positioned for engaging a reagent container
positioned on a container support in the reagent delivery zone and
initiating reagent delivery from the reagent container to a slide
supported on a slide support in the reagent receiving zone.