“…The P value refers only 10 the 4 cases that had saline controls. 16 If the groups are compared only on the basis of those in whom crossover controls were possible (TABLE 3), it will be noted that the administration of thioperazine followed by mescaline was not associated with any significant fall of the ninhydrin positive substances when compared statistically to the thioperazine-saline controls. At 4 hours, the thioperazine-mescaline group (4 cases with crossover controls) showed a 23.6 per cent fall of the ninhydrin positive substances from the base line, while the thioperazine-saline group had fallen only 16.4 per cent at the same time.…”