518 



INDEX. 



Heat, Knight's experiments ■with, up- 

 on melons and cucumbers, 36 

 " radiation of, 37 



" etTect of, on the quality and 



quantity of wine, 37 



" of soil increased by drainage, 102 



Heeling-iu, 291 



Hoar-frost, 35 



Humus, 62 



Hybrids, obtaining seed from, 405 



Hybridization, 896 



" manner of operation, 404 



" qualities obtained from 



the female and male 



parents, 415 



Hydrogen, 169 



Ice resting upon strawberry plants, 31 



" trees girdled by, 32 



" floods, 56 

 Illinois, Northern, fruits adapted 



to, 20G-243 



" Central, do. do., 205-243 



" Southern, do. do., 206-243 

 " best 6 varieties of apples for 



100 trees, 268 



" best 12 do. do., 268 



" best 20 do. do., 268 



" best varieties of apples for 



market for 1000 trees 268 

 Indiana, Nortliern, fruits adapted 



to, 206-243 



Southern, do. do., 208-243 



Inland climate, 28 



Inorganic substances, 178 



Insects, life of, 425 



" Coleoptera, 420 



" Orthoptera, , 426 



" Hemiptera, 427 



" Neuroptera, 426 



" Lepidoptera, 427 



" Diptera, 427 



" Ilymenoptera, 428 



Iodine, 180 



Iowa, fruits adapted to, 206-243 



Iron, oxides of, 180 



" sulphuret of, 181 



Irrigation of fiuittrce.?, 354 



Island or coast climate, 27 



Isothermal lines, 2C 



PJlGB 



Kentucky, fruits adapted to, 206-243 



" best 6 varieties of apples 



for 100 trees, 261 



" best 12 do. do., 262 



" best 20 do. do., 262 



" best varieties of apples 



for 1000 trees, 262 



" best varieties of pears on 



pear stock, 262 



" best varieties of pears on 



quince stock, 262 



" best varieties of peaches, 263 



Land, value of. 

 Light, 



135 



42 



" experiment with, upon peaches, 42 



" chemical properties of, 43 



" of the moon, 43 



Lime, 179 



" carbonate of, 179 



" sulphate of, ISO 



" nitrate of, 180 



" phosphate of, 180 



" action of, 185 



Kansas, fruits adapted to, 



Magnesia, carbonate of, 181 



Magnesium, cloride of, 181 



Maine, fruits adapted to, 206-243 



" best varieties of apples for, 245 



" " " " pears " 245 



" " " " plums " 245 



" " " " cherries " 245 



JIanganese, 181 



Manure, adapted to clay earth, 183 



" " " peaty soil, 183 



" " " sandy soil, 186 



" heap, formation of, 186 



" liquid, 194 



" " value of, 196 



" application of, 197 



" " " paper upon, 



by Boussingault, 198 



" green, application of, 200 



Marl, 185 



Maryland, fruits adapted to, 206-243 



Massachusetts, fruits adapted to, 206-243 

 " best varieties of ap- 



ples for, 245 



" best 12 varieties of ap- 



ples (or, 245 



" best varieties of pears 



I on pear stock for 100 



206-243 trees, 246 



