INDEX. 



593 



Marsh plants, 160 



Maturation of fruit accelerated or re- 

 tarded by water, 102 

 Medullary rays, 35, 42 



instances of tissue thrown 



out from, to replace a 

 surface injury, 37 

 Melons, effects of their roots being im- 

 . mersed in water, 168 



importance of "setting" their 



flowers, 469 



Mr. Knight's experiments in the 



cultivation of, 469 



Persian, their tendency to de- 



generate, 469 



Melon seeds, reason why old are pre- 

 ferred to new, 104 



M^ne, M,, result of his expeiiments with 

 gypsum, 553 



Metallic substances in plants, 561 



Metamorphosis of the parts of plants, 

 82-92 



Mignonette, remarkable instance of the 

 rooting of, 19 



Mildew, prevented by watering, 176 



probable cause o^ 550 



Mineral substances in plants, 561 

 Mistletoe, grafting of, 346 

 Mixed development of leaves, 56 



Mohl, Professor, his refutation of Knight's 

 theory, 269 



remarks on the descend- 

 ing sap in plants, 71 



— — ■ remarks on the duration 



of plants, 41 



Moisture, abundant supply of, required 

 by plants in a growing state, 

 164 



absorption of, by leaves, 70 



action of, on cuttings hardly 



inferior to that of heat, 

 291 



atmospheric, when amounting 



to saturation occasions a ces- 

 sation- of perspiration in 

 plants, 68 



connected with temperature, 



177 



effects of an excessive supply 



of, 166 _ ^^^ 

 effects of, in inducing vegeta- 

 tion, 261 



effects of, on pollen, 241 



equability of, a neoessaiy con- 

 dition in the striking of 

 leaves, 277 



— in the air of hothouses, axioms 



relating to, 212 

 its mean near London, 185 



its range, 184 



Moisture, its tendency to produce decay 

 in seeds, 247 



maxims relating to the proper 



balancing of, 212 



much atmospheric, injurious 



when fruit is ripening, 524 



■ necessary to produce germina- 

 tion, 14, 227 



necessity of, adjusting in the 



striking of cuttings, 289 



of hothouses, necessity of re- 

 gulating, 205 



of the soil, 159 



preserved by means of oiled 



paper, 218 



should be sparingly applied to 



the roots of trees previously 

 too much dried, 462 



Monocotyledons, 41 



Monstrosity, a cause of sterility, 242 

 causes inducing it, 502 



Moon, the April, 174 



Moonlight, its effects on plants, 63 



Motion of fluid within the cells of plants, 



different from motion of sap, 9 

 Mulberry, Knight's mode of striking, 285 



mode of pruning, 380 



propagation of, by budding,310 



Mules, their origin, 96 

 Muling, 488 



almost impossibility of species, 



497 

 bigenerio, apocryphal, 497 



Gsertner's conclusions, 496 



limits of its operation, 497 



practical instructions for, 490 



Mviriate of lime, its use in the preserva- 

 tion of seeds, 244 



of soda, its free absorption by 



roots, 27 



Natural grafting, 320 

 Nectarine-trees, mode of pruning, 384 

 rules and directions for, 



Neumann, M., his mode of propagating 

 by leaves, 279 



by roots, 282 



his mode of treating cut- 

 tings of succulents, 294 



Night, diminution of the functions of 

 plants in the, 514 



soil as manure, ^nd mode of ap- 

 plying it, 563 



Nilgherries, temperature of, 121 



Nitrate of potash as manure, 564 



Nitric acid, 28, 547 



Nitrogen, or azote, a component part in 

 the food of plants, 28, 529 



derivation of its supply, 28, 648 



