Seasons of the year, relation to diet, [296]

Secretin, [32]

Secretion, of gastric juice, [24]

of pancreatic juice, [31], [32]

of saliva, [17], [18]

Sivén, on proteid requirement, [89]

Skatol, [38]

Sleep, heat production during, [104], [105]

Soaps, [36]

Sodium carbonate, in pancreatic juice, [32]