Catechism of Agricultural Chemistry and GeologyW. Blackwood, 1844 - 48 páginas |
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Página 3
... light may be applied to the jet , when the gas will take fire and burn . The cork and jet may now be taken out of the bottle , and a lighted taper intro- duced into it , when the taper will be extinguished , while the gas itself will ...
... light may be applied to the jet , when the gas will take fire and burn . The cork and jet may now be taken out of the bottle , and a lighted taper intro- duced into it , when the taper will be extinguished , while the gas itself will ...
Página 4
... light that it will carry heavy bodies up with it through the air . Q. What is oxygen ? A. Oxygen is also a kind of air , in which a candle burns with great brilliancy , in which animals also can live , and which is heavier than hydrogen ...
... light that it will carry heavy bodies up with it through the air . Q. What is oxygen ? A. Oxygen is also a kind of air , in which a candle burns with great brilliancy , in which animals also can live , and which is heavier than hydrogen ...
Página 19
... would call a loam ; if much lime was present , I would call it a calcareous loam ; and if it were a clay with much lime , I would call it a calcareous clay . Q. What do you understand by light and heavy lands CHEMISTRY AND GEOLOGY . 19.
... would call a loam ; if much lime was present , I would call it a calcareous loam ; and if it were a clay with much lime , I would call it a calcareous clay . Q. What do you understand by light and heavy lands CHEMISTRY AND GEOLOGY . 19.
Página 20
James Finlay Weir Johnston. Q. What do you understand by light and heavy lands ? A. Light lands are such as contain a large pro- portion of sand or gravel ; heavy lands , such as con- tain much clay . The teacher may illustrate this , by ...
James Finlay Weir Johnston. Q. What do you understand by light and heavy lands ? A. Light lands are such as contain a large pro- portion of sand or gravel ; heavy lands , such as con- tain much clay . The teacher may illustrate this , by ...
Página 30
... light and sandy soils , and into such as contain very little vegetable matter . Q. Is not sea - weed or sea - ware a very valuable manure ? A. Yes , wherever sea - weed can be obtained in large quantity , it is found to enrich the soil ...
... light and sandy soils , and into such as contain very little vegetable matter . Q. Is not sea - weed or sea - ware a very valuable manure ? A. Yes , wherever sea - weed can be obtained in large quantity , it is found to enrich the soil ...
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...