INDEX 



Sound, vibrations of, rate 

 of travel, 165 



Spencer, Herbert, on trans- 

 mission of acquired char- 

 acters, 25 



Spontaneous generation, 7- 

 8 



Sutton, Bland, on tumors, 

 32 



Sympathetic, the great, 

 146-150 



Taste, sense of, man dis- 

 satisfied with, 157-158 



Touch, the queen of our 

 senses, 168; the instru- 

 ment of the mind, 170 



Tubercle bacillus, repro- 

 ductive powers of, 68-69 



Tuberculosis described by 

 Hippocrates, 64 



Tumors and cancerous 

 growths, 31-33 



Tyndall, matter eternal, 29 



Unicellular organisms are 

 unchangeable, 87-89; an- 

 tagonistic to multicellu- 

 lar, 103-105 



Vegetable bacteria, 74-77 

 Vitality, importance of, 

 106-112 



Wart defined, 31 



Wasps, heredity in, 54-56 



Wasserman, Prof., on 

 blood-tests, 50 



Weismann, Prof. August, 

 on transmission of ac- 

 quired characters, 24 



Whale, biological history 

 of, 40-43, 45, 47-48 



Whitney, Prof., on ferti- 

 lizing bacteria, 77 



Wilson, Prof. E. B.: on 

 cell development, 102; on 

 fitness, 133 



Yellow fever and smallpox 

 germs contrasted, 66-67 



