Essentials of Biology Presented in Problems: By George William HunterAmerican book Company, 1911 - 448 من الصفحات |
طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
adapted alcohol algæ American Book Company amount arteries bacteria bean Biology birds blood vessels body bones Botany breathing called calories carbon dioxide caused cavity cells cent chlorophyll color colorless corpuscles containing corn corpuscles cotyledons crayfish crustaceans developed digestive disease eggs especially example fibers fish flower fluid food material food tube forest frog fruit germinate germs gills glands grain grow growth heat important insects intestine known Laboratory Manual large number larvæ layer leaf leaves legs living lungs Macmillan Company means membrane milk mollusks mouth muscles nerve nervous system nitrogen organs oxidation oxygen parasites pass peas Physiology pistil plants and animals poison pollen Prob proteid protoplasm Protozoa root hair seeds seen skeleton skin soil sponge spores stamens starch stem stomach stomata structure substances sugar supply surface temperature tiny tion tissues trees typhoid veins vertebrate walls wings worm xerophytes young
مقاطع مشهورة
الصفحة 405 - 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 405 - The hell to be endured hereafter, of which theology tells, is no worse than the hell we make for ourselves in this world by habitually fashioning our characters in the wrong way.
الصفحة 405 - I won't count this time." Well ! he may not count it, and a kind Heaven may not count it ; but it is being counted none the less. Down among his nerve cells and fibers the molecules are counting it, registering and storing it up to be used against him when the next temptation comes.
الصفحة 405 - 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 405 - 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. We are spinning our own fates, good or evil, and never to be undone. Every smallest stroke of virtue or of vice leaves its never so little scar. The drunken Rip Van Winkle, in Jefferson's play, excuses himself for every fresh dereliction by saying, 'I won't count this time!
الصفحة 380 - One of the most common and pernicious of the popular errors relating to alcohol is the supposition that it somehow strengthens the heart. The full, bounding pulse, usually produced by the administration of an ounce or two of brandy, gives the impression of an increased vigor of heart action; but it is only necessary to determine the blood pressure by means of a Riva-Rocci instrument or Gaertner's tonometer, to discover that the blood pressure is not raised and may be lowered.
الصفحة 427 - If one's use of diet and air is proper, the fatigue point will be much further off than otherwise. One should learn to relax when not in activity. The habit produces rest, even between exertions very close together, and enables one to continue to repeat those exertions for a much longer time than otherwise. The habit of lying down when tired is a good one. The same principles apply to mental rest. Avoid worry, anger, fear, excitement, hate, jealousy, grief, and all depressing or abnormal mental states....
الصفحة 347 - In small doses these substances are oxidized in the body and yield a corresponding amount of energy, but their value from this standpoint is altogether unimportant compared with their action as stimulants. Alcohol also, when not taken in too large quantities, may be oxidized in the body, and furnish a not inconsiderable amount of energy. It is, however, a matter of controversy at present whether alcohol in small doses can be considered a true foodstuff, capable of serving as a direct source of energy,...
الصفحة 414 - In like manner the influence of all drugs which affect the nervous system must be in the direction of disintegration. The healthy mind stands in clear and normal relations with Nature. It feels pain as pain. It feels action as pleasure. The drug which conceals pain or gives a false pleasure when pleasure does not exist forces a lie upon the nervous system.
الصفحة 430 - 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.
معلومات المراجع
| العنوان | Essentials of Biology Presented in Problems: By George William Hunter |
| المؤلف | George William Hunter |
| الناشر | American book Company, 1911 |
| أصلي من | جامعة ميتشيغان |
| الكتب ذات التنسيق الرقمي | 28 حزيران (يونيو) 2007 |
| عدد الصفحات | 448 من الصفحات |
| تصدير الاقتباس | BiBTeX EndNote RefMan |