897 



Grasses. Red coloration 282 



Gray sand 243 



Green-manure fertilization ....234, 267, 271 

 Greening of inflorescences 341 



— of younger foliage. Deficient. 526-27 

 Ground water level. Depth in moor soils. 257 



Lowering 106. 150-5-2 



— Raising 183 



Growth. Arrestment due to radium rays. 672 

 due to Roentgen rays 672 



— Defoliation 347 



— Effect of humidity 423-25 



of potassium fertilization 156 



Growth, Double 156 



— Immature. Effect of frost 554 



— Twisted 774, 821 



Guigiiardia Bidwellii 26, 669 



Gum cells 851 



Gum exudation in Acacias 707-8 



in bitter oranges 708-9 



in plants 707-17 



Gummosis. Use of vinegar made from 

 wine 707 



Gummosis of cherries 699-707 



— of fig trees 710-11 



— of olives 711 



Gymnosporangium 53 



Gyiiinosporangium Sabiiwc 62 



Gunnera 11 



Gypsum 195, 250, 402 



Habitat. Effect of changes on herba- 

 ceous plants 72-75 



Habits, determining peculiarities in 

 plants 39 



Hail 463-70 



— Effect on grain 464 



— Effect on hops 466 



— Effect on potatoes 466 



— Effect on rape 466 



— Effect on tomatoes 467 



Hail, cannonading against 470 



— causing bark wounds 468 



• hard flavor in grapes 469 



— — lodging of the stalks of grain.. 542 

 proliferated grain heads 466 



Handles on trees 848 



Hard-shells of seeds 115, 420 



Harp-trees 93 



Harrowing 236 



Harvest. Decrease due to tree shade... 657 



Health. Latitude 9 



Heart rot 615. 851 



due to waste lime 19; 



of beets 415-16 



of horse radish 717 



Heart wood. False 851. 852 



Wound 852 



Heat. Death 638 



— Defoliation 347, 411-12, 644-45 



— Excess 638-53 



Premature ripening 640 



5"^^ also Sunburn. 



— Lack 498-637 



Heat rigor 638 



Heath soils. Disadvantages 242 



Helianthus annus. Effect of defoliation. 341 



Helichrysum I34 



Helotium 54 



Hemi-celluloses 705 



Hemi-parasites i- 



Hemi-saprophytes 1-2 



Herbaceousness in grapes 345 



Hericia 855 



Hibiscus vitif alius. Intumescence 448 



Hieraciuiii alpinum 84 



Hilling of heavy soil 234 



Hippeastrum 127 



Hippophac rhamnoides. L 90, 150 



Hoar frost 636 



Summer 637 



Hoeing of the soil 184, 234 



Holoparasites i- 



Holosaprophytes 12 



Homogamy 293 



Honey dew 55, 412-15 



Hops. Barrenness 34^-44 



— Blindness 342 



— Copper rust 283 



— Effect of hail 466 



— Eft'ect of shading 283 



— Eool's head formation 342 



— Eox 282 



— Heating 344 



— Pole red 283 



— Red tan 282 



— Reds 282-83 



— Summer rust 282 



Hormodendrum disease 742 



Horn prosenchyma 707 



Horn shavings. Use as fertilizer. . .393, 395 

 Horse radish. Black ring condition .717, 884 



Heart rot 717, 884 



Horticulture. Use of sand 261 



— Use of sphagnum peat 260 



Hot bed plants. Wilting 2-jj 



House plants 419-20 



Leaf fall 352 



Humea I34 



Humic acid 241, 722 



Humidity 123 



— Effect on mode of growth 423-25 



Humidity, Excessive. Effect. .75, 123, 423-57 



Humin 241 



Humus. Raw 149. 190, 242, 271 



Humus fermenting organisms 272 



— sandstone 243 



— substances 15 r 



Hyacinths. Ring disease of bulbs. 326-27, 451 



— Shedding of the young flower 



clusters 356-57 



— Skin diseases 451-53 



Hybrid formation by grafting 845 



Hydrochloric acid 724-29 



Hydrocyanic acid 761 



Hydrofluoric acid 729-30 



Hypochlorin 502 



Hypocrea rufa 17 



— Sacchari 227 



Hypoplasia I77 



Hypoxylon 53 



Hvsterium 54 



