PAVLOV, Ivan Petrovich.
Study of the Higher Nervous Activity (Behaviour) of Animals. Conditioned Reflexes.
Tall 8vo (24 x 16 cm). Photographic portrait frontispiece, 397,  pp. with illustrations in text; inscription on title dated 1925. Original printed wrappers, last quire splitting, plain dust jacket, worn at extremities, housed in a modern red morocco-backed cloth slipcase.