1. The output and composition of proteins in nerve stimulated saliva samples were compared. 2. Protein output upon parasympathetic stimulation was higher than following sympathetic stimulation and was accompanied by an obvious degranulation of acini with the former but not the latter. These events are the converse of those in the rat parotid gland. 3. Superimposition of sympathetic upon parasympathetic stimulation caused an augmented output of salivary protein. 4. Electrophoresis of salivas revealed differences between individual cats in protein composition but not between differently stimulated salivas.
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