A Year in Science: A Text-book for First Year in High SchoolsRow, Peterson, 1916 - 441 páginas |
Dentro del libro
Resultados 1-5 de 100
Página xvi
... produced and carried by animals ; Animals injurious to crops . CHAPTER XXXV . MAN'S PLACE IN NATURE .. 286 Classification ; Differences between man and other primates ; Age and races of man ; The human body . CHAPTER XXXVI . FOODS ...
... produced and carried by animals ; Animals injurious to crops . CHAPTER XXXV . MAN'S PLACE IN NATURE .. 286 Classification ; Differences between man and other primates ; Age and races of man ; The human body . CHAPTER XXXVI . FOODS ...
Página 40
... produced . The fact that the melting points of substances differ greatly makes it possible to melt sugar in a glass vessel , or glass in an iron vessel . Why ? Some substances gradually soften and become pliable before they melt . This ...
... produced . The fact that the melting points of substances differ greatly makes it possible to melt sugar in a glass vessel , or glass in an iron vessel . Why ? Some substances gradually soften and become pliable before they melt . This ...
Página 61
... producing charcoal is to heat wood in closed iron ovens . The principle involved in either case is the same ; namely , to break down the compounds which comprise wood into simpler substances , and drive off all but carbon . Animal ...
... producing charcoal is to heat wood in closed iron ovens . The principle involved in either case is the same ; namely , to break down the compounds which comprise wood into simpler substances , and drive off all but carbon . Animal ...
Página 64
... produced . Copyright by Underwood & Underwood , N. Y. Fig . 28. Cutting peat in Ireland , where it is used as a ... produced from coal in very much the same manner that charcoal is produced from wood . When coal is heated away from air ...
... produced . Copyright by Underwood & Underwood , N. Y. Fig . 28. Cutting peat in Ireland , where it is used as a ... produced from coal in very much the same manner that charcoal is produced from wood . When coal is heated away from air ...
Página 65
... produced which are finally encased in the wood . The hardness of the pencil depends upon the relative proportions of graphite and clay ; the more clay the harder the pencil . Diamond . The diamond is pure carbon . It differs from other ...
... produced which are finally encased in the wood . The hardness of the pencil depends upon the relative proportions of graphite and clay ; the more clay the harder the pencil . Diamond . The diamond is pure carbon . It differs from other ...
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Otras ediciones - Ver todas
A Year in Science: A Text-Book for First Year in High Schools Joseph Luther Thalman,Ada Louise Weckel Sin vista previa disponible - 2016 |
A Year in Science; a Text-book for First Year in High Schools Joseph Luther Thalman,Ada Louise Weckel Sin vista previa disponible - 2023 |
Términos y frases comunes
acid alcohol amount of heat atmosphere bacteria become body boiling point bone bottle burning called calories of heat carbon dioxide carried cause cavity cells centigrade CHAPTER charcoal chemical chemical compound chloric acid coal cold color compound contain cooled digestive diseases earth elements epidermis erosion fact Fahrenheit flask freezing friction match gases germs glands hard water hydrochloric acid hydrogen important inch insects inter-molecular spaces intestine iron known land layer liquid living matter melting mercuric oxide mercury mixture molecules mountain mouth muscles Name necessary nerve nitrogen organs oxide oxygen particles passes phosphorus physical plants and animals point of water pollen pressure produced protoplasm rain regions result river rock roots salt sand sodium hydroxide soil solid starch stream structure substances sugar sulphur sulphur dioxide surface temperature test tube thermometer tissue tumbler waste products water vapor weather winds wood
Pasajes populares
Página 386 - 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.
Página 387 - 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.
Página 170 - THERE rolls the deep where grew the tree. O earth, what changes hast thou seen ! There where the long street roars hath been The stillness of the central sea. The hills are shadows, and they flow From form to form, and nothing stands ; They melt like mist, the solid lands, Like clouds they shape themselves and go.
Página 387 - 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. 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...
Página 387 - 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..
Página 161 - THE SEA. I am the Sea. I hold the land As one holds an apple in his hand. Hold it fast with sleepless eyes, Watching the continents sink and rise. Out of my bosom the mountains grow, Back to its depths they crumble slow : The earth is a helpless child to me — I am the Sea! I am the Sea. When I draw back Blossom and verdure follow my track, And the land I leave grows proud and fair, For the wonderful race of...
Página 387 - 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,
Página 161 - ... rise and reign and die, Living and dying in folly and pain, While the laws of the universe thunder in vain. What is the folly of man to me? I am the Sea ! I am the Sea. The earth I sway ; Granite to me is potter's clay ; Under the touch of my careless waves It rises in turrets and sinks in caves ; The iron cliffs that edge the land I grind to pebbles and sift to sand, And beach-grass bloweth and children play In what were the rocks of yesterday. It is but a moment of sport to me. I am the Sea...
Página 152 - ... if the earth's axis were perpendicular to the plane of its orbit, and the excessive variation which would result if the axis were nearly parallel to that plane.
Página 159 - evidence of things not seen," in the fulness of Divine grace ; and was profound on this, the greatest concern of human life, while unable even to comprehend how the " inclination of the earth's axis to the plane of its orbit" could be the cause of the change of the seasons.