“…For example, we excluded all hypnotics and sedatives, analgesics such as morphine, etc., for to do otherwise would dilute our collection with a great deal of extraneous, yet related, material. It was decided to index all effects of three major classes of behavioral drugs, the tranquilizers, the antidepressants and hallucinogens or psychotomimetics upon (1) mental illness, including the psychoses and neuroses, symptoms as well as the entire disease (it is not always easy to differentiate between these two entities); (2) normal behavior in animals and man under a variety of experimental conditions, especially when well-known, reasonably objective psychological tests can be employed; (3) physiological and biochemical effects on animals and man, especially upon enzymes and enzyme systems, blood and tissue constituents, etc., including all recorded side effects, with particular emphasis upon toxicology; (4) experimental conditions produced in animals and man by drugs and other means (e.g., model psychoses, etc.). In addition, the metabolism of these agents was stressed, although this required a somewhat modified type of indexing.…”