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The Sun-paul Must Consider Only One Thing: What Is The Relation Of This Or That External Reaction Of The Animal To The Phenomena Of The External World?

The Physiologist Who Succeeds In Penetrating Deeper And Deeper Into The Digestive Canal Becomes Convinced That It Consists Of A Number Of Chemical Laboratories Equipped With Various Mechanical Devices.

It Is Still Open To Question Whether Psychology Is A Natural Science, Or Whether It Can Be Regarded As A Science At All.

The Gastric Laboratory Uses Its Protein Ferment Under An Acid Reaction.

As Was To Be Expected, The Discovery Of The Nervous Apparatus Of The Salivary Glands Immediately Impelled Physiologists To Seek A Similar Apparatus In Other Glands Lying Deeper In The Digestive Canal.