INDEX. 



341 



Radiation, to prevent, 218 



Rain water to be preferred, 33 



ammonia in, 34: 



Rain in England, 84, 114 



Raking, 47, 64 



Rendles system of heating, 229 



Rest-haiTow, 117 



Retentive power of manures, 103 



Rhododendron, cross with azalea, 

 201 



■ — ferrugineum, 82 



Rice, ^ 



Ridging, its benefits, 55, 59, 65 



Ring of Pomona, 167 



Ripening wood, 132, 162 



Room plants, their culture, 75 



Rooms-, their temperature, 77 



Roots, temperature they like, 22 



effect of heat and cold upon, 



23, 73 



effects of salts on, 30 



v.hy they descend, 43 



their duration, 49 



most abundant in poor soils, 



5' I 



how to guide, 50 



excess of, checks the pro- 

 duction of seed, 52 



oxygen to, 55 



whv to be near the surface, 



58 



their power of selection, 107 



their extremities, 6Q 



renewed annually, 67 



their extent, 67 



reqiiire a certain suppl}' of 



water, 74 



a plant's own best, 155 



to promote produce of, 1G7 



Rosa pcrpetuosissima, 200 



Rose, increasing its fragrance, 54 



seed 15 



Rotation of crops, 53 



Salt (common), 81, 109 



Salt, as a remedy, 273, 807, 319 



Saltpetre, 81 



Salts as manures, 97 



in plants, 98 



■ when to be used, 99 



their effect on roots. 30 



Sand, 84 



Sandv soils, grasses for. 65 



Sap, 152 



power v.'ith which it rises, 



153, 300 



its elaboration, 154 



its descent, 1 5 



checking its return, 166 



required by fruit, 217 



checking its ascent, 217 



extravasated, 295 



Saw-wort, 118 



Scar of seed, 42 



Science of Gardening, 2 



Scion, hov.- influenced bv the stock, 



154—160 

 and stock must be related, 



177 

 Seedlings, time before they bear, 197 

 Seed-packing, 33 

 Seed-producing shortens the life 



of a plant, 49 

 Seed-vessel, its office, 214 

 Seeds, 212 

 time they retain A'itality, 9, 



11 



containing nitrosen, 9, 11 



oil, 12 



differ in excitability, 13 



time of germinat- 



ing, 14 



some bear great heat, 16 



their germination accele- 

 rated, 31 



depths to bur}-, 39, 47 



abound with carbon, 40 



why buried in the soil, 41 



time germinating, 42 



how fertilized, 191 



