Publisher's Synopsis
Excerpt from The Theory and Practice of Sanitation in Country Places: Including the Bacteriolytic Tank-System
Everyone is familiar with the changes produced in the dry arid land by a week of soaking rain and genial warmth. What was formerly a. Desert of bare barren sand is now a field of living green. Hees, dreary and lea?ess since last autumn, have burst their buds and donned their leafy mantles. The whole earth is covered with varied forms of beauty and wondrous varieties of color, and is redolent with sweet odors. By and-by field and vineyard and garden will be full of rich fruits, and the forests will be heavier with timber.
But these visible changes are not the only results of plant growth. There are others, less obvious, but not less wonderful. The living substance contained in innumerable plant cells has been employed In converting certain constituents of the soil into hundreds of principles which, though apparently of no direct use to the plants themselves, are nevertheless of unspeakable benefit to mankind. When one con siders that from cinchona bark over 60 distinct substances have been separated, and from Opium about 40, many of which are of great chemical complexity, one realises something of the enormous extent and variety of the processes that depend upon the relations between the soil and plant life.
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