[Method of producing cooled liquid propane in a histochemistry laboratory]

A simple and inexpensive method of gaseous propane liquefaction is proposed using the facilities of a histochemical laboratory. The method is based on the principle of propane condensation. Propane has a higher liquefaction temperature than liquid nitrogen used as a cooling agent. The method advocated provides production in 5-7 minutes of 15-20 ml of liquid cooled propane by the evaporation of about 100 ml of liquid nitrogen.