Lectures on Agricultural Chemistry and Geology |
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Page 23
... gaseous substances and vapours which exist in the atmosphere ; ‡ and on this property , as I shall explain hereafter , the use of charcoal powder as a manure probably in some measure depends . 2 ° . They also separate from water any ...
... gaseous substances and vapours which exist in the atmosphere ; ‡ and on this property , as I shall explain hereafter , the use of charcoal powder as a manure probably in some measure depends . 2 ° . They also separate from water any ...
Page 24
... gaseous or aeriform state . * By the unaided senses it cannot be distinguished from common air , being void of colour , taste and smell . But if a lighted taper be plunged into it , the flame is wonderfully increased both in size and ...
... gaseous or aeriform state . * By the unaided senses it cannot be distinguished from common air , being void of colour , taste and smell . But if a lighted taper be plunged into it , the flame is wonderfully increased both in size and ...
Page 28
... gaseous substances , which when pure are destitute of co- lour , taste , and smell . They cannot be distinguished by the aid of our senses . Man in a state of nature - uneduca- ted man - cannot discern that they are different . Yet so ...
... gaseous substances , which when pure are destitute of co- lour , taste , and smell . They cannot be distinguished by the aid of our senses . Man in a state of nature - uneduca- ted man - cannot discern that they are different . Yet so ...
Page 35
... gaseous state , and the former is known to be inhaled , under certain conditions , by the leaves of plants . Nitro- gen may also in like manner be absorbed by the leaves of living plants , but , if so , it is in a quantity so small as ...
... gaseous state , and the former is known to be inhaled , under certain conditions , by the leaves of plants . Nitro- gen may also in like manner be absorbed by the leaves of living plants , but , if so , it is in a quantity so small as ...
Page 42
... gaseous as steam . At 32 ° F. and at lower tem- peratures , it continues solid , at higher temperatures it melts ACTION OF SNOW . 43 and forms a liquid ( Of water, and its relations to vegetable life Of water, and its relations to ...
... gaseous as steam . At 32 ° F. and at lower tem- peratures , it continues solid , at higher temperatures it melts ACTION OF SNOW . 43 and forms a liquid ( Of water, and its relations to vegetable life Of water, and its relations to ...
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Common terms and phrases
absorbed acetic acetic acid acre action agriculture ammonia animal and vegetable appears atmosphere atoms bark bulk cane sugar carbonic acid cent chemical changes circulation of plants colour compounds consist constitution contain crop decay decomposed decomposition derived diastase elements enter exists experiments functions gaseous germination globe gluten gradually grain grape sugar grass grow growth gypsum heat Hence hereafter hydrogen inorganic interior juices land leaf leaves lecture less Liebig light lime liquid living plant manure nature nitrate of soda nitric acid nitrogen observed organic matter oxalic acid oxygen oxygen gas portion potash present produced properties proportion quantity readily roots of plants salts seed silica soil solid substances soluble solution stances starch stem sulphate sulphuric acid supply supposed tain take place tartaric acid temperature tion trees trogen undergo vegetable matter vegetable substances vessels vinegar watery vapour weight wheat wood woody fibre
Popular passages
Page 94 - have not the slightest reason for believing that the nitrogen of " the atmosphere takes part in the processes of assimilation of " plants and animals ; on the contrary, we know that many plants " emit nitrogen, which is absorbed by their roots, either in a " gaseous form or in solution in water.
Page 47 - ... drawn out to a point. (See Fig. 98.) If a dry, cold tumbler be held over a jet of burning hydrogen, its interior will rapidly become covered with a copious deposition of moisture. This results from a condensation of the vapor of water produced by the union of the hydrogen with the oxygen of the atmosphere. 296.
Page 10 - Proceedings of the Geological and Polytechnic Society of the West Riding of Yorkshire.
Page 78 - Do grasses and trees derive their carbon from the soil? Then, how, by their growth do they increase the quantity of carbonaceous matter which the soil contains? "It is obvious that, taken as a whole, they must draw from the air not only as much as is contained in their own substance, but an excess also, which they impart to the soil.
Page 82 - ... maturity. When a plant is quite matured, and when the organs, by which it obtains food from the atmosphere, are formed, the carbonic acid of the soil is no further required.