Catechism of Agricultural Chemistry and GeologyW. Blackwood, 1844 - 48 sider |
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Side 2
... usually of a black colour , which has no taste or smell , and burns more or less readily in the fire . Wood - charcoal , lampblack , coke , and black - lead , are varieties of carbon . The teacher will here exhibit a piece of charcoal ...
... usually of a black colour , which has no taste or smell , and burns more or less readily in the fire . Wood - charcoal , lampblack , coke , and black - lead , are varieties of carbon . The teacher will here exhibit a piece of charcoal ...
Side 2
... usually of a black colour , which has no taste or smell , and burns more or less readily in the fire . Wood - charcoal , lamp- black , coke , and black - lead , are varieties of carbon . The teacher will here exhibit a piece of charcoal ...
... usually of a black colour , which has no taste or smell , and burns more or less readily in the fire . Wood - charcoal , lamp- black , coke , and black - lead , are varieties of carbon . The teacher will here exhibit a piece of charcoal ...
Side 9
... usually cultivated plants . Q. Do all plants leave the same quantity of ash when burned ? A. No. Some leave much more ash than others . Thus 100 lbs . of hay leave 9 or 10 lbs . of ash , while 100 lbs . of wheat leave less than 2 lbs ...
... usually cultivated plants . Q. Do all plants leave the same quantity of ash when burned ? A. No. Some leave much more ash than others . Thus 100 lbs . of hay leave 9 or 10 lbs . of ash , while 100 lbs . of wheat leave less than 2 lbs ...
Side 14
... usually most A. The woody fibre is the most abundant in nearly all plants . Q. In what part of the plant is the starch found most plentifully ? A. The starch is found most abundantly in the seeds of plants , and in the roots of such as ...
... usually most A. The woody fibre is the most abundant in nearly all plants . Q. In what part of the plant is the starch found most plentifully ? A. The starch is found most abundantly in the seeds of plants , and in the roots of such as ...
Side 20
... usually stand most in need of draining ? A. The heavy clay lands retain water most , and should therefore be generally drained first . Q. Do light lands not require draining A. Yes , though dry at the surface , such soils are often wet ...
... usually stand most in need of draining ? A. The heavy clay lands retain water most , and should therefore be generally drained first . Q. Do light lands not require draining A. Yes , though dry at the surface , such soils are often wet ...
Vanlige uttrykk og setninger
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
Populære avsnitt
Side 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...