It is well known that the various processes in the body may be influenced by changes in its metabolism. In regard to the salivary glands, Savitch in Pavlov's laboratory, working with dogs, and Krasnogorsky, working with children, have proved that overfeeding causes inhibition of the conditioned reflexes to the substances that are fed in abnormal amount and augmentation of the conditioned reflexes to other foods.
The object of these experiments was to determine whether thirst bears any relation to the secretion of saliva. It has already been shown in the laboratory of Pavlov that the gastric secretion in dogs may be greatly diminished when the intake of fluids is insufficient. The salivary and gastric secretions, however, are not always parallel.
I used two children in these researches, one for the investigation of the parotid and the other for the investigation of the submaxillary secretion. Krasnogorsky discovered that there are some