Catechism of Agricultural Chemistry and Geology |
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Page 2
... 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 ...
... 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 ...
Page 2
... 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 ...
... 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 ...
Page 4
... live , and which is heavier than hydrogen or com- mon air . It forms one - fifth of the bulk of the air we breathe . Fig . 5 . The teacher will here ex- hibit a bottle of oxygen gas , and show how rapidly and brilliantly a lighted taper ...
... live , and which is heavier than hydrogen or com- mon air . It forms one - fifth of the bulk of the air we breathe . Fig . 5 . The teacher will here ex- hibit a bottle of oxygen gas , and show how rapidly and brilliantly a lighted taper ...
Page 5
... 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 will ...
... 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 will ...
Page 9
... live and grow . Q. Where do plants obtain their food ? A. They obtain it partly from the air and partly from the soil . Q. How do they take in their food ? A. They take it in by their leaves from the CHEMISTRY AND GEOLOGY . 9.
... live and grow . Q. Where do plants obtain their food ? A. They obtain it partly from the air and partly from the soil . Q. How do they take in their food ? A. They take it in by their leaves from the CHEMISTRY AND GEOLOGY . 9.
Common terms and phrases
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
Popular passages
Page 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...