Vitality. 
Fragments of Science, Vol. II (1879)
                                    
John Tyndall: Idézetek angolul
                                        
                                        p, 125 
New Fragments (1892)
                                    
“[W]aste in intellect may be as much an incident of growth as waste in nature.”
                                        
                                        p, 125 
New Fragments (1892)
                                    
                                        
                                        p, 125 
New Fragments (1892)
                                    
                                        
                                        p, 125 
New Fragments (1892)
                                    
                                        
                                        Matter and Force. 
Fragments of Science, Vol. II (1879)
                                    
                                        
                                        p, 125 
New Fragments (1892)
                                    
                                        
                                        Science and Man. 
Fragments of Science, Vol. II (1879)
                                    
                                        
                                        p, 125 
New Fragments (1892)