A text-book on agricultural chemistry, for the use of academies, schools, and agriculturalists: comprising that portion of elementary chemistry which is necessary to a full understanding of the changes connected with vegetable organization, and an examination of the different manures, soils, crops, &c. . supply of nitrogen must be ensuredfrom other sources, one of the principal of which is thefollowing compound. AMMONIA. NH3=17. Ammonia is a gaseous compound, consisting of nitro-gen and hydrogen, united in the proportion of one atomof the former to three of the latter, 14+3=17 theequivalent nu
A text-book on agricultural chemistry, for the use of academies, schools, and agriculturalists: comprising that portion of elementary chemistry which is necessary to a full understanding of the changes connected with vegetable organization, and an examination of the different manures, soils, crops, &c. . supply of nitrogen must be ensuredfrom other sources, one of the principal of which is thefollowing compound. AMMONIA. NH3=17. Ammonia is a gaseous compound, consisting of nitro-gen and hydrogen, united in the proportion of one atomof the former to three of the latter, 14+3=17 theequivalent number for ammonia. If we pulverize sal-ammoniac, mix it with an equal quantity of slacked lime,and add water sufficient to form it into a paste ; by ap-plying heat, ammonia will be produced. It is a colorlessgas, of an exceedingly pungent and irritating odor, andlighter than atmospheric air in the ratio of 59 to 100. Water absorbs this gas with great avidity, especiallyat low temperatures. At the freezing point it takes up780 times its own bulk. Thus dissolved in water, it What proof? What is the effect of nitric acid upon vegetation? Isit applied in the acid form ? What is said relative to the quantity of thisacid in soils ? How is ananionia obtained ? How much of this gas doeswater absoit> 2. 40 AGRICULTURAL CHEMISTRY. forms hartshorn or aqua ammonia. It was formerlyobtained mostly from horn, and from this circumstancederives its name. It is plain that in producing this gas, it can not becollected over water, as it would be ab-^^^ sorbed by that fluid ; but since it is muchlighter than air, it can be collected in aninverted bottle or flask, as in (Fig. 13.) Ammonia will not support combustion,but is itself in a slight degree is given oflin considerable quantity fromdecaying animal substances, and thosevegetables which contain nitrogen give ofl*ammonia in the process of gas is a source from which plants probably obtainboth hydrogen and nitro
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectagricul, bookyear1847
