Catechism of Agricultural Chemistry and GeologyW. Blackwood, 1844 - 48 páginas |
No interior do livro
Resultados 1-5 de 16
Página 2
... animal live , and which , after being mixed with common air , explodes when it is brought near the flame of a candle . It is also the lightest of all known substances . Here the teacher will take a beer or champaign glass 2 CATECHISM OF ...
... animal live , and which , after being mixed with common air , explodes when it is brought near the flame of a candle . It is also the lightest of all known substances . Here the teacher will take a beer or champaign glass 2 CATECHISM OF ...
Página 2
... animal live , and which , after being mixed with common air , explodes when it is brought near the flame of a candle . It is also the lightest of all known substances . Here the teacher will take a beer or champaign glass 2 CATECHISM OF ...
... animal live , and which , after being mixed with common air , explodes when it is brought near the flame of a candle . It is also the lightest of all known substances . Here the teacher will take a beer or champaign glass 2 CATECHISM OF ...
Página 5
... animal live in it , but unlike hy- drogen , it will not burn , and it does not take fire when brought near the flame of a candle . It is a little lighter than atmospheric air , of which it forms four - fifths of the bulk . The teacher ...
... animal live in it , but unlike hy- drogen , it will not burn , and it does not take fire when brought near the flame of a candle . It is a little lighter than atmospheric air , of which it forms four - fifths of the bulk . The teacher ...
Página 15
... animals and plants thus appear to live for each other's support ? A. Yes , the animal produces carbonic acid , upon which plants live , and from this carbonic acid and water together , plants produce starch , & c . upon which animals ...
... animals and plants thus appear to live for each other's support ? A. Yes , the animal produces carbonic acid , upon which plants live , and from this carbonic acid and water together , plants produce starch , & c . upon which animals ...
Página 29
... animal manures , and mineral manures . Q. What do you mean by vegetable manures ? A. By vegetable manures , I mean those parts of plants which are usually buried in the soil for the purpose of making it more productive . Q. Name the ...
... animal manures , and mineral manures . Q. What do you mean by vegetable manures ? A. By vegetable manures , I mean those parts of plants which are usually buried in the soil for the purpose of making it more productive . Q. Name the ...
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...