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On the ground of clinical symptoms of pulmonary fibrosis in one or both apexes, confirmed by roentgen examination, a positive reaction to tuberculin, positive Abderhalden reactions to lung and brain and an increase of alkali reserve, Hartmann finds himself justified in framing a physiopathologic theory of hallucinosis. Similarly, he speculates elaborately on the explanation of melancholia on the grounds of an Abderhalden reaction to liver. The logical structure of the detailed speculations may satisfy certain minds. The references to the vegetative system and to the balance between certain compounds (particularly calcium-potassium) of body fluids are well used, and the presumptive disorders in both the vegetative system and the humoral state give, to superficial reading, a satisfactory explanation of respiratory and mental disturbances and of the interrelation between them.
Unfortunately for the theory, pulmonary changes on a tuberculosis basis of one or both apexes are commonplace and therefore it is easy