Название | The Reason Why |
---|---|
Автор произведения | Robert Kemp Philp |
Жанр | Математика |
Серия | |
Издательство | Математика |
Год выпуска | 0 |
isbn | 4064066154523 |
Plants, why are their seeds formed within the corollas of flowers, 1168
Plants, why does the flower of the poppy turn down during the early formation of seed, 1169
Plants, why have those of the pea-tribe a folding blossom, 1170
Plants, why are leaf-buds enclosed in scales which fall off as the leaves open, 1171
Plants, what is meant by "species" of, 1209
Plants, what is meant by "genus" of, 1210
Plants, progressive discovery of new species, 1211
Plants, what are the three great classes of, 1212
LESSON LVIII.
Plants, what are the characteristics of exogenous, 1213
Plants, what are the characteristics of cryptogamus, 1216
Plants, what are the effects of diverse climates upon, 1242
Plants, what are the effects of altitude upon mountains, 1243
Plants, what agencies influence their geographical distribution, 1250
Plants, what are the chief facts connected with the distribution of by man, 1251
Plants, why are herbaceous less solid than woody, 1265
Plants, why are the stalks of herbaceous generally cylindrical, 1266
Plants, what are the stomata of, 1267
Plants, why are their stomata generally on the underside of their leaves, 1268
Plants, why have they pith in their centres, 1269
Porter, why does bottled produce large volumes of froth, 801
Pulse, why do we feel it beat, 900
Quadrupeds, geographical distribution of, 1331
Quicksilver, why does it reflect light from mirrors, 513
LESSON LIX.
Radiation, why does scratching a bright metal surface increase its powers of, 199
Radiation of heat, what benefits arise from it, 415
Radiation of light, what is it, 503
Radiation, do all bodies radiate light, 504
Rain, what is it, 416
Rain, does it ever occur without clouds, 417
Rain-drops, why are they sometimes large, and at other times small, 418
Rains, at what seasons are they most prevalent, 419
Rainy days, in what months of the year are they most frequent, 420
Rainy days, why are there more from September to March, 421
Rain, in what part of the world does the greatest quantity fall, 422
Rain, in what part of the world do the heaviest rains fall, 423
Rain, in what part of the world does the least rain fall, 424
Rainy days, how many are there in a year, 425
Rain, in what part of England does the greatest quantity fall, 426
Rains, why do the heaviest occur in hot countries, 427
LESSON LX.
Rain, why does the greatest quantity fall at the equator, 428
Rain, why are some parts of the earth without it, 429
Rain, why does it purify the air, 433
Rainy localities, why are mountainous countries more rainy than flat ones, 434
Rain, why does more fall by night than by day, 435
Rain, why do bunches of dried sea-weed indicate its coming, 436
Rain, why do weather-toys foretell its coming, 437
Rain, the Capuchin toy; mysterious walk of a wooden horse, 438
Rain, why does ladies' hair drop out of curl as rain approaches, 438
Rain, why is it said to be coming, when the mountains are "putting on their night-caps", 439
Rainbow, what causes a, 486
Rainbow, why does it exhibit colours, 487
Rainbows, why are there sometimes two, 488
Rainbows, why are the columns of the secondary bow, arranged in the reverse order of those of the primary, 489
LESSON LXI.
Rainbow colours, why do glass lustres and chandeliers exhibit them, 498
Rainbows, why are the colours of the secondary bow fainter than those of the primary, 491
Rainbow, what is a lunar, 492
Rainbow, why is a lunar bow fainter than the solar, 493
Rainbow, why is one in the morning the shepherd's warning, 538
Rainbow, why is one at night the shepherd's delight, 539
Refraction of light, what is it, 472
Refraction and reflection of light, what is the difference, 502
Reflections, why are they reversed, 490
Reflection, why do black bodies reflect any light, 505
Reflection, why does a window-pane appear to reflect better by night than by day, 516
Reflection, what is the line of, 520
Reflection, what is the angle of, 522
Repulsion, what is it, 792
Respiration, why does the chest expand when we breathe, 889
Respiration, how does blood communicate with the air in the lungs, 890
Rest, why does it invigorate us, 1018
Rice, where is it cultivated, 1219
Rosewood, what is it, 1191
LESSON LXII.
Saliva, why does saliva enter the mouth while we are eating, 872
Sea, why is it salt, 764
Sea, what is the estimated amount of salt in the, 765
Sea, what is the depth of the, 766
Sea-gulls, why are they numerous in fine weather, 1119
Sea-gulls, why do they fly over the land on the approach of stormy weather, 1120
Sea-crow, why is its lower bill longer than the upper, 1135
Sealing-wax, why does rubbing it attract to it small particles of matter, 565
See, why do we, 963
Seeds, why are they generally enveloped in hard cases, 1152
Seeds, why do they throw out roots before they form leaves, 1153
Seeds, why does the leaf-germ come up to the light and the root-germ penetrate the earth,