| In der Schein-Welt: Gedichte 4 | 
                    
                                                
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                    | Gemischte Kost. Gedichte 5 | 
                    
                                                
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                    | General Survey | 
                    
                                                
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                    | Abnormal Development in Plants: A Survey | 
                    
                                                
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                    | Histological Foundations of Differentiation and Development in Plants | 
                    
                                                
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                    | Polarity and Gradients in Plants: A Survey | 
                    
                                                
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                    | Defense Reactions of Plants to the Presence of Toxins: Sonderdruck | 
                    
                                                
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                    | Luffa Sponges, A New Crop For The Americans | 
                    
                                                
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                    | Das Ende des Instinktbegriffs | 
                    
                                                
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                    | Wound Healing in Higher Plants. II | 
                    
                                                
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                    | Wie denkt man heute über den Instinktbegriff? | 
                    
                                                
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                    | Polarity in Plants | 
                    
                                                
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                    | Patterns of Scientific and Poetic Thought: Sonderdruck | 
                    
                                                
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                    | Goethe, Idealistic Morphology, and Science: Sonderdruck | 
                    
                                                
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                    | Wound Healing in Higher Plants: Sonderdruck | 
                    
                                                
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                    | Development of the Fibrous Net in the Fruit of Various Races of Luffa Cylindrica | 
                    
                                                
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