778 



INDEX 



Tyrosin, 33 



Tyrosinase, 58, S9 



Twin cherries, figures of, 334 



U 



Ultramicroscopic organisms, 21 



Umbilicaria on Octorara schist, 83 



Uncinula, key to species of, 725, 726 



Unhappy white elm, figure of, 287 



Unorganized ferments, 56 



Urease, 59 



Urea-splitting enzymes, 59 



Uredinales, 187; phylogeny of, 197 



Uredineae, 187; characters of, 187 



Urediniospores, 188 



Uredinium, 188 



Uredo gossypii, 508 



Uredospores, 49, 188 



Urobacillus Duclauxii, length and 



breadth of, 22 

 Urocystis cepalae, 531; several species, 



185 



Uromyces betae on beets, 485; figure cf 

 species, 200; species of, 201; striatus 

 on alfalfa, 477; trifoh'i, 502 



Usnea barbata, mechanic tissues of, 81; 

 the beard lichen, 83 



Ustilaginaceae, characters of family, 178 



Ustilago avenae, figures of, 532; of 

 several species, 180; levis, figures of, 

 S32; maydis on maize and teosinte, 

 86; origin of name, 178; zea;, 504, s°5, 

 S06; figure of, 505; tritici, figures of, 

 562 



Vaccination, 314 



Vaccinium vitis-idaea, gall on, 389 



Valsaceae, characters of, 163 



Van Wisselingh, C, work of, 52 



Variegation, 343 



Vaucheria, 44 



Vegetable slant, figure of, 597 



Velum partiale, 232 



Velum universale, 232 



Velvet bean tubercles, figure of, 386 

 Venturia inequalis, 479, 480, 481; 



figures of, 480; pomi, 163 

 Verpa digitaliformis, 171 

 Verticillium albo-atrum, 646 

 Vibio cholera, rapidity of cell division, 24 

 Villia, 141 



Violet leaf -spot, figure of, 559 

 Violet spot diseases, 558 

 Virescence, 339 

 Volutin in fungi, 53 

 \'oIva, 232 



Von Tavel, Dr. F., cited, 89 

 Von Wettstein, R., mentioned, 61 



W 



Wager, Harold, work of, 135 



WaUroth mentioned, 7 



Walter, H., work of, 271 



Ward, H. M., and ginger beer organisms, 

 140 



Water analysis, 626 



Water content of tissues and disease, 280 



Water-core of apple, S7i 



Water, influence of, 279 



Water-logging, 567 



Watermelons, 525; wilt of, 646 



Water requirements of plants, 279, 280 



Wettstein, R. von, 2 



Wheat, 560; broth, 599; rust, 188; 

 forms of, 201, 202; smut, figures of, 562 



White pine blister-rust, 537 



White rust of cruciferous plants, 74 



Whey, litmus, 600 



Will, Dr. H., 142 



Wilt, 342 



Wilting, 342, 34S, 346; experiments 

 with, 652, 653 



Wilt of corn, 507; figure of experiment 

 with, 646; of cotton, experiments 

 with, 646; of cowpeas, 646; of egg 

 plant, 646; of melons, 325; of sweet 

 corn, 644; of watermelon, 646 



Wilson, Lucy L. W. on Conopholis 

 americana, 301 



