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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?

Gradualness, Gradualness, And Gradualness. From The Very Beginning Of Your Work, School Yourself To Severe Gradualness In The Accumulation Of Knowledge.

It Is Clear To All That The Animal Organism Is A Highly Complex System Consisting Of An Almost Infinite Series Of Parts Connected Both With One Another And, As A Total Complex, With The Surrounding World, With Which It Is In A State Of Equilibrium.

Perfect As The Wing Of A Bird May Be, It Will Never Enable The Bird To Fly If Unsupported By The Air. Facts Are The Air Of Science. Without Them A Man Of Science Can Never Rise.

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.