Civic and Economic BiologyP. Blakiston's son & Company, 1922 - 470 من الصفحات |
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طبعات أخرى - عرض جميع المقتطفات
Civic and Economic Biology (Classic Reprint) <span dir=ltr>William Henry Atwood</span> لا تتوفر معاينة - 2018 |
عبارات ومصطلحات مألوفة
acid Agriculture algæ allantois ameba amnion antennæ antheridium archegonium asexual bacteria become birds blood body breeding buds called carbohydrates carbon dioxide carpels cattle cells chlorophyll chromosomes color cone conjugation contains corn cotyledons crop developed diagram digestion disease domestic earthworm embryo endosperm euglena fats female fern fertilized fish fleshy flowers frog fruit gametes gametophyte gastrula geotropic germinate glucose grow growth hybrids illustrated insects intestine kinds known Laboratory larvæ leaf leaves live male mammals megaspore method moss nerve nervous system Note nucellus nucleus organs ovary oxygen parent pass pine pistil plants and animals poison pollen grain pollen tube potato produced proteins quantity roots salt seed seedling soil species sperms spores sporophyte stamens starch stem structure sugar surface thigmotropism tion tissue trees U. S. Dept usually varieties veins vertebrate weed wheat wild
مقاطع مشهورة
الصفحة 160 - Could the young but realize how soon they will become mere walking bundles of habits, they would give more heed to their conduct while in the plastic state.
الصفحة 161 - As we become permanent drunkards by so many separate drinks, so we become saints in the moral, and authorities and experts in the practical and scientific spheres, by so many separate acts and hours of work.
الصفحة 160 - Nothing we ever do is, in strict scientific literalness, wiped out. Of course this has its good side as well as its bad one. As we become permanent drunkards by so many separate drinks, so we become saints in the moral, and authorities and experts in the practical and scientific spheres, by so many separate acts and hours of work.
الصفحة 161 - Let no youth have any anxiety about the upshot of his education, whatever the line of it may be. If he keep faithfully busy each hour of the working day, he may safely leave the final result to itself. He can with perfect certainty count on waking up some fine morning to find himself one of the competent ones of his generation, in whatever pursuit he may have singled out..
الصفحة 332 - If we count the value of each life lost at only $1,700 and reckon the average earning lost by illness at $700 per year for grown men, we find that the economic gain from mitigation of preventable disease in the United States would exceed $1,500,000,000 a year.
الصفحة 299 - in 1791 a ram lamb was born in Massachusetts, having short, crooked legs and a long back like a turnspit dog. From this one lamb the otter or ancon semi-monstrous breed was raised ; as these sheep could not leap over the fences, it was thought that they would be valuable ; but they have been supplanted by merinos, and thus exterminated.
الصفحة 444 - By the end of two years from the enactment of "the hawk law," the farmers found their fields and orchards thoroughly overrun by destructive mice, rats and insects; and again they went clamoring to the legislature, this time for the quick repeal of the law. With all possible haste this was brought about; but it was estimated by competent judges that in damages to their crops "the fool hawk law" cost the farmers of the state of Pennsylvania more than $2,000,000.
الصفحة 166 - A party of engineers were surveying in the Sierra Nevadas. They camped at a great height above the sea level, where the air was very cold and they were chilled and uncomfortable. Some of them drank a little whisky and felt less uncomfortable ; some of them drank a lot of whisky and went to bed feeling very jolly and comfortable indeed. But in the morning the men who had not taken any whisky got up in...
الصفحة 374 - In our district it was a common occurrence to find on opening the front door in early morning, leaning against it, the corpse of some victim who in the night-time had " rested" in its shelter. We raised a public subscription, and employed two men with horse and cart to go round each day and gather up the dead.
الصفحة 373 - The harvest of 1845 promised to be the richest gathered for many years. Suddenly, in one short month, in one week it might be said, the withering breath of a simoom seemed to sweep the land, blasting all in its path. I myself saw whole tracts of potato growth changed in one night from smiling luxuriance to a shrivelled and blackened waste.