" 1Appetite, craving for food, is a constant and powerful stimulator of the gastric glands.
]But man has still another powerful resource: natural science with its strictly objective methods "
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![Ivan Pavlov quote : 1Appetite, craving for food, is a constant and powerful stimulator of the gastric glands.<br /><br />]But man has still another powerful resource: natural science with its strictly objective methods](/image/1369087.jpg)