177, hybrid, 88-93; number, 40, 

 41, 56, 57, 61, 62, 72, 84, 85; popu- 

 lar names, 23, 90; propagation, 

 61, 84, 90-94; rapidity of increase, 

 118, 119; selective breeding and 

 feeding, 14, 56, 57, 61-64, 84; size, 

 23, 24, 25, 90; structure, 26; till- 

 age, 49, 148-152, 154, 155; weight, 

 63 



"Earthworms in Role of Great Bene- 

 factors of the Human Race," by 

 W. A. Anderson, 48 



Earthworms of Ohio, The, by Dr. 

 Henry W. Olson, % 



"Earthworms, 150,000 to the Acre," 

 by Williams Haynes, 149-152 



Egypt, 14, 43, 47, 53, 57; fertility 

 of soil, 46-48, 51 



England, 39, 40, 56, 84, 89 



Europe, 25 



Experiment Station Record, 166 



Farm Forum, WGY, 41 



Farm Journal and Farmer's Wife, 

 149, 150 



Farming, 25, 65, 155; general, 65, 

 68, 69, 74 



Faulkner, Edward H., 81, 148 



Fertilizers, chemical, 12, 78, 80, 82, 

 151; organic, 61, 68, 70, 72, 82, 

 148, 149; scientific, 68 



Fishworms, 23, 92, 150 



Flood Control, 41 



Florida Agricultural College, 52 



Food Crops, 20 



Forest Service, United States De- 

 partment of Agriculture, 49 



Forest soil, 41-42, 160, 162 



"Forest Soil in Relation to Silvi- 

 culture," by Prof. Svend O. Hei- 

 berg, 42 



"Formation of Soil," by Curtis 

 Fletcher Marbut, 41 



Formation of Vegetable Mould 

 through the Action of Earth- 

 worms, With Observations on 

 Their Habits, The, by Charles 

 Darwin, 38, 74, 88 



Gallup, Christopher, 149, 150-152; 



158 

 Garbage disposal, 61, 125-126, 175 



182] 



Gardening, 67, 74-75, 102, 103; 

 home, 25, 32, 65, 75 



Gezira, The, 44, 45 



Giescke, F., 156, 166 



Greaves, Dr. Joseph K, 77 



Greece, 14 



"Green Color of Plants and What 

 Comes of It, The," by Harold 

 William Rickett, 172 



Green Earth, The, by Harold Wil- 

 liam Rickett, 172 



Han ford Loam, 78-88 



Harnessing the Earthworm, 13, 74, 

 93, 153, 155 



Harrowing, 151 



Harvard University, 35 



Haynes, Williams, 150 



Heiberg, Prof, Svend O., 41, 42 



Helodrilus foetidus, 24 



Helodrilus trapezoides, 97 



Hensen, V., 156, 166 



H., H. A., 119 



Hilgard, Dr. E. W., 47 



Hinckley, Frank, 78-83, 148 



Howard, Sir Albert, 149 



Howes, Paul Griswold, 28 



Humus, 9, 10, 13; acid, 39; defini- 

 tion, 20; distribution, 20, 21, 36; 

 "factory of nature," 13, 21, 22, 

 73; fertility of, 46; formation of, 

 21, 22 ; source, 13, 20, 23, 30, 37 



Hybrid Earthworms, 88-93 



Illinois, 41 

 Irrigation, 80 



Jacobson, H. G. M., 153, 158 

 Japan, 43 



Journal of Agricultural Science, 167 

 Journal of Experimental Biology, 



167 



Journal of Forestry, 42 

 Journal of the Linnean Society, 



Bol, 167 



Khartoum, 43, 44 

 Knop, 52 



Lactuca sativa, 157 

 Landwehr Jahrbuch, 166 

 Landwehr Jahrbuch, Schweiz, 167 

 Lawns, 40, 48, 89, 90 



