Catechism of Agricultural Chemistry and Geology |
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Page 5
... substances , namely , potash , soda , lime , magnesia , oxide of iron , silica , chlorine , sul- phuric acid , or oil of vitriol , and phosphoric acid . Here the teacher may exhibit to his pupils , potash CHEMISTRY AND GEOLOGY .
... substances , namely , potash , soda , lime , magnesia , oxide of iron , silica , chlorine , sul- phuric acid , or oil of vitriol , and phosphoric acid . Here the teacher may exhibit to his pupils , potash CHEMISTRY AND GEOLOGY .
Page 6
... magnesia , in the forms of quicklime and calcined magnesia ; oxide of iron , in the form of rust of iron ; silica , in the form of a piece of flint , rock crystal or quartz , ( chucky - stone ) ; a bottle of chlorine gas , one of ...
... magnesia , in the forms of quicklime and calcined magnesia ; oxide of iron , in the form of rust of iron ; silica , in the form of a piece of flint , rock crystal or quartz , ( chucky - stone ) ; a bottle of chlorine gas , one of ...
Page 7
... magnesia ? A. Magnesia is the white powder sold in the shops under the name of calcined magnesia . It has scarcely any taste , and is extracted from sea water and from some kinds of limestone rock . Q. What is iron ? A. Iron is a hard ...
... magnesia ? A. Magnesia is the white powder sold in the shops under the name of calcined magnesia . It has scarcely any taste , and is extracted from sea water and from some kinds of limestone rock . Q. What is iron ? A. Iron is a hard ...
Page 22
... Yes , it contains small quantities of eight or nine other substances . Q. Name these substances ? A. Potash , soda , magnesia , oxide of iron , oxide of manganese , sulphuric acid , phosphoric acid , chlo- rine 22 CATECHISM OF AGRICULTURAL.
... Yes , it contains small quantities of eight or nine other substances . Q. Name these substances ? A. Potash , soda , magnesia , oxide of iron , oxide of manganese , sulphuric acid , phosphoric acid , chlo- rine 22 CATECHISM OF AGRICULTURAL.
Page 23
... magnesia , & c . do not ex- ist in the air . Q. How does this earthy matter enter into the plant ? A. It enters by the roots . Q. In what state ? A. In a state of solution . The rain and spring waters dissolve them and carry them into ...
... magnesia , & c . do not ex- ist in the air . Q. How does this earthy matter enter into the plant ? A. It enters by the roots . Q. In what state ? A. In a state of solution . The rain and spring waters dissolve them and carry them into ...
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...