In our irregular series of posts about medical museums that must be seen (see earlier presentation here), the turn has now come to The Museum of Questionable Medical Devices, now at the Science Museum of Minnesota. Founded by a certain Bob McCoy (when?) it contains some 250 quack devices from the 19th and 20th centuries, including a prostate gland warmer, a phrenology machine, a recto rotor, a nose straightener, a wonder electro marvel, etc. One of the most recent artefacts is a “Crystaldyne pain reliever” which others would probably describe as an electric gas-barbecue-grill igniter. According to the maker it can relieve headaches, back pain, arthritis, stress, menstrual cramps, earaches, sinus, nosebleeds, flu and other ailments. For further reading, see Bob McCoy, Quack! Tales of Medical Fraud from the Museum of Questionable Medical Devices, Santa Monica Press, 2000.