Catechism of Agricultural Chemistry and GeologyW. Blackwood, 1844 - 48 sider |
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Resultat 1-5 av 12
Side 2
... wood in the candle , and show that one part burns away and that another very small part— the ash — does not burn away . Q. Which of these two parts is the greater in quantity ? A. In all vegetable substances , the organic part is very ...
... wood in the candle , and show that one part burns away and that another very small part— the ash — does not burn away . Q. Which of these two parts is the greater in quantity ? A. In all vegetable substances , the organic part is very ...
Side 2
... wood in the can- dle , and show that one part burns and that another very small the ash - does not burn away part away . Q. Which of these two parts is the greater in quantity ? A. In all vegetable sub- stances , the organic part is ...
... wood in the can- dle , and show that one part burns and that another very small the ash - does not burn away part away . Q. Which of these two parts is the greater in quantity ? A. In all vegetable sub- stances , the organic part is ...
Side 5
... wood , oils , and fats , contain only these three elements . Q. Of what substances does the inorganic part of the plant consist ? A. The inorganic part of plants contains from eight to ten different substances , namely , potash , soda ...
... wood , oils , and fats , contain only these three elements . Q. Of what substances does the inorganic part of the plant consist ? A. The inorganic part of plants contains from eight to ten different substances , namely , potash , soda ...
Side 6
... wood ashes ( the ashes left by wood when it is burned ) with water , and after- wards boiling the liquid to dryness . The teacher will here allow his pupils to taste the potash , that they may become familiar with the meaning of the ...
... wood ashes ( the ashes left by wood when it is burned ) with water , and after- wards boiling the liquid to dryness . The teacher will here allow his pupils to taste the potash , that they may become familiar with the meaning of the ...
Side 7
... wood , stones , and other substances to which the name of metals is not applied . Q. What is oxide of iron ? A. When polished iron is exposed to the air it gradually becomes covered with rust . This rust consists of the metal iron , and ...
... wood , stones , and other substances to which the name of metals is not applied . Q. What is oxide of iron ? A. When polished iron is exposed to the air it gradually becomes covered with rust . This rust consists of the metal iron , and ...
Vanlige uttrykk og setninger
AGRICULTURAL CHEMISTRY ammonia animal require applied bone-earth bones burns called carbon and water carbonic acid gas CHEMISTRY AND GEOLOGY Chlorine clover common salt compost consist of carbon contain cow-dung crops cwts draining dung earth EDINBURGH employed fall to powder farm-yard manure farmer fattening fermentation fertile give gluten grass lands grow guano gypsum hydrogen inorganic kind of air large quantity leaves LECTURES ON AGRICULTURAL light lands lighted taper limestone liquid magnesia marl mixed nitrogen oats obtain oil of vitriol organic food organic matter oxide of iron oxygen gas phosphate of lime phosphoric acid plants require potash potatoes produced profit proportion pupils quicklime roots sea-weed shell sand Silica slaked smell soda soil consists sour starch straw subsoil substances sulphuric acid supply taste teacher may exhibit teacher may illustrate teacher will show turnip usually vegetable waste wheat white fumes wood woody fibre
Populære avsnitt
Side 17 - Q. Whence is the organic part of the soil derived? A. It is derived from the roots and stems of decayed plants, and from the dung and remains of animals and insects of various kinds. Q. Does this organic part form a large proportion of the soil ? A. Of peaty soils it forms sometimes three-fourths of the whole weight; but of rich and fertile soils it does not usually form more than from a twentieth to a tenth of the whole weight. Q. Can a soil bear good crops which does not contain a considerable...