طبعات أخرى - عرض جميع المقتطفات
acid alcohol alimentary canal amoeba amount animal aorta arteries auricle bacteria becomes bile blood vessels bone bottle brain branches burning called capillaries carbohydrates carbon dioxid carried cartilage chemical color composed compounds connective tissue dermis digestion dorsal duct epidermis esophagus experiments finger frog functions gastric juice glands grape sugar heart heat Hence human incisors ingredients kidneys Laboratory Exercises larynx Latin layer legs less liquid liver lower lungs lymph meat membrane microscope milk mineral matters molar mouth cavity mucous muscles muscular nerve fibers nervous system nitrogen nutrients opening organs outer oxidation oxygen pancreatic pancreatic juice papillæ passes phosphorus proteids protoplasm pulmonary red corpuscles region respiration ribs saliva salt side skeleton skin small intestine spinal column spinal cord starch stomach structure substance sulphur supply surface teeth test tube throat cavity tion tongue upper valves veins ventral ventricle vertebrates walls waste windpipe
الصفحة 285 - My mind seems to have become a kind of machine for grinding general laws out of large collections of facts ; but why this should have caused the atrophy of that part of the brain alone on which the higher tastes depend, I cannot conceive.
الصفحة 285 - I suppose, have thus suffered; and if I had to live my life again, I would have made a rule to read some poetry and listen to some music at least once every week; for perhaps the parts of my brain now atrophied would thus have been kept active through use.
الصفحة 282 - 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 283 - 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 283 - 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 283 - 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 62 - The use of intoxicants by employes while on duty is prohibited. Their habitual use, or the frequenting of places where they are sold, is sufficient cause for dismissal.
الصفحة 56 - First, extremely little of the alcohol was given off from the body unconsumed ; indeed, it was oxidized, ie, burned as completely as bread, meat, or any other food. Second, in the oxidation all of the potential energy of the alcohol was transformed into heat or muscular power. In other words, the body transformed the energy of the alcohol as it did that of sugar, starch, and other ordinary food materials.
الصفحة 243 - 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 good condition ; those who had taken a little whisky got up feeling very miserable ; the men who...