[A controlled-temperature microscope stage for extended observations of living materials (author's transl)].

We have designed a controlled-temperature stage for the observations of live microorganisms under all magnifications of the compound microscope. The use of water-immersion objectives eliminates the need for a cover-slip and permits interventions such as liquid medium changes, microsurgery or the insertion of microelectrodes. Simple in design and relatively inexpensive this stage has an observation area of 50 X 75 mm.