Catechism of Agricultural Chemistry and GeologyW. Blackwood, 1844 - 48 sider |
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Resultat 1-5 av 10
Side 2
... exhibit a piece of charcoal and show how it burns in the fire , or in the flame of a candle . Q. What is hydrogen ? A. Hydrogen is a kind of air or gas which burns in the air as coal gas does , but in which a candle will not burn , nor ...
... exhibit a piece of charcoal and show how it burns in the fire , or in the flame of a candle . Q. What is hydrogen ? A. Hydrogen is a kind of air or gas which burns in the air as coal gas does , but in which a candle will not burn , nor ...
Side 2
... exhibit a piece of charcoal and show how it burns in the fire , or in the flame of a can- dle . Q. What is hydrogen ? A. Hydrogen is a kind of air or gas which burns in the air as coal gas does , but in which a candle will not burn ...
... exhibit a piece of charcoal and show how it burns in the fire , or in the flame of a can- dle . Q. What is hydrogen ? A. Hydrogen is a kind of air or gas which burns in the air as coal gas does , but in which a candle will not burn ...
Side 5
... exhibit a bottle of this gas , and show that a lighted taper is extinguished when in- troduced into it . The easiest mode of preparing nitrogen is by mix- ing together a quantity of sal ammoniac with half its weight of salt - petre ...
... exhibit a bottle of this gas , and show that a lighted taper is extinguished when in- troduced into it . The easiest mode of preparing nitrogen is by mix- ing together a quantity of sal ammoniac with half its weight of salt - petre ...
Side 6
James Finlay Weir Johnston. Here the teacher may exhibit to his pupils , potash in the form of the common pearl ash of the shops ; soda , in that of the common soda of the shops ; lime and magnesia , in the forms of quicklime and ...
James Finlay Weir Johnston. Here the teacher may exhibit to his pupils , potash in the form of the common pearl ash of the shops ; soda , in that of the common soda of the shops ; lime and magnesia , in the forms of quicklime and ...
Side 7
... exhibit a piece of quicklime , will allow his pupils to taste it , and will pour water upon it , that it may fall to powder . They will thus become fami- liar with the word slake . Q. What is magnesia ? A. Magnesia is the white powder ...
... exhibit a piece of quicklime , will allow his pupils to taste it , and will pour water upon it , that it may fall to powder . They will thus become fami- liar with the word slake . Q. What is magnesia ? A. Magnesia is the white powder ...
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...