title: On drinkometers: problems and an inexpensive photocell solution.
mesh_terms: D000818:Animals; D004327:Drinking Behavior; D004582:Electronics, Medical; D008297:Male; D055095:Optics and Photonics; D011603:Psychophysiology / Q000295:instrumentation*; D011803:Quinine / Q000378:metabolism; D051381:Rats; D013649:Taste; D013997:Time Factors; D014867:Water / Q000378:metabolism
chemical_list: D014867:Water; D011803:Quinine