SUBJECT INDEX 



291 



Tin-foil impressions, 196, 197 



Tissue formation, 63 



Toxalbumen, 143 



Toxin-antitoxin reactions, 144, 145 



Toxins, 143 



Trace substances, 64 



Trace substances and health, 120 



Trace substances, in biology, 68 



Trace substances, in plants, 119, 120 



Transformation, bacterial, 132 



Translocation, 159 



Transmutation, of atoms, 18 



Travertine, 46 



Trichlorbutyl alcohol, 209 



Trigger action, 201 



Triple stain, Alexander-Jackson, 243 



Trophoblasts, 185 



Troublesome traces, 67 



Trypanosome infections, 240 



Tryptophane, 163 



Tubercle bacillus, 133 



Tuberculosis, 243 



Turacin, 119 



Units of measurement, 36 

 Universe, observable, 33 

 Uric acid, 223 

 Ussher's chronology, 251 



Vaccination, 140 



Variations in experimental animals, 



222 

 Vestiges of creation, 249 

 Virus, transmission of, 236 

 Viruses, 79, 81, 84 

 Vitamers, 77 



Vitamin A and blindness, 210 

 Vitamins, 68, 69, 76 

 Vitality, of bacteria, seeds, etc., 86, 87 

 Vitriol, origin of word, 45 

 Volcanism, basis of, 28 



Wassermann test, 145 

 Water, structures of, 44 

 Wheat seed, life of, 87 

 Wisdom vs. Knowledge, 259 

 Wolffian regeneration, 211 



X-ray spectra, 17 

 X-rays, 10 



/east fermentation, 129, 130 

 Yeasts, training of, 197 

 Yellow enzyme, 198 

 Yellow mice, 222 



Ziehl-Neelson stain, 243 

 Zygote, molecules in, 182 



