Catechism of Agricultural Chemistry and GeologyW. Blackwood, 1844 - 48 páginas |
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Página 6
... manufactured from sea salt . The teacher will show a crystal of the common soda of the shops , and explain the meaning of the word crystallized . Q. What is lime ? A. Lime or quick - lime is a white earthy 6 CATECHISM OF AGRICULTURAL.
... manufactured from sea salt . The teacher will show a crystal of the common soda of the shops , and explain the meaning of the word crystallized . Q. What is lime ? A. Lime or quick - lime is a white earthy 6 CATECHISM OF AGRICULTURAL.
Página 7
... explain the word metal , by showing that such common metals as iron , copper , lead , silver , and gold have a lustre , weight , and malleability not possessed by wood , stones , and other substances to which the name of metals is not ...
... explain the word metal , by showing that such common metals as iron , copper , lead , silver , and gold have a lustre , weight , and malleability not possessed by wood , stones , and other substances to which the name of metals is not ...
Página 16
... explain- ing more particularly the word elements , contrasting the nature of the elementary bodies , hydrogen , oxygen , carbon , and nitrogen , which cannot be separated or split up into more than one kind of matter , with such ...
... explain- ing more particularly the word elements , contrasting the nature of the elementary bodies , hydrogen , oxygen , carbon , and nitrogen , which cannot be separated or split up into more than one kind of matter , with such ...
Página 17
... explain the meaning of the new word carbonaceous . Q. Whence is the organic part of the soil derived ? A. It is derived Fig . 12 . from the roots and stems of decayed plants , and from the dung and remains of animals and insects of va ...
... explain the meaning of the new word carbonaceous . Q. Whence is the organic part of the soil derived ? A. It is derived Fig . 12 . from the roots and stems of decayed plants , and from the dung and remains of animals and insects of va ...
Página 19
... explain the new word calcareous . Q. But if they were mixed together in large pro- portions how would you name them ? A. A mixture of sand and clay with a little lime I would call a loam ; if much lime was present , I would call it a ...
... explain the new word calcareous . Q. But if they were mixed together in large pro- portions how would you name them ? A. A mixture of sand and clay with a little lime I would call a loam ; if much lime was present , I would call it a ...
Palavras e frases frequentes
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
Passagens conhecidas
Página 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...