Rivers As Sources of Water Supply
Rivers As Sources of Water Supply
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.. .. O'l Synura Spirogyra I . 2 Oscillaria j Fragillaria ) n . 9 K Volvox / _, Dinobryon .. .. .. .. 0'3 Synedra .. .. .. .. .. 1-0 Peridinium, and probably the allied Ceratium . . 2'0 The microscopic appearances of some of these growths are shown in figs. 3 and 4 (see p. 76).
It will be noted that the dose varies greatly for the different kinds of growths, and unless the maximum dose is used, which would destroy fish, and be otherwise objectionable, there is always the chance, with lesser amo...unts, of paving the way for the active development of another kind of growth or growths, at the expense of those inhibited or killed. In interfering with the balance of Nature, it is difficult to foresee all the possible consequences.
It is possible, experimentally, to give a dose of copper sulphate just strong enough to restrain the development of asterionella in water, and yet insufficient to check the active growth of the slightly more hardy fragillaria. Nor is it altogether inconceivable, that starting with the delicate uroglena, one might, by varying the dose, induce one set of organisms to multiply and take its place in one reservoir, another lot in a second reservoir, yet another in a third reservoir, and so on.
What to read after Rivers As Sources of Water Supply?
You can find similar books in the "Read Also" column, or choose other free books by Alexander Cruikshank Houston to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
.. .. O'l Synura Spirogyra I . 2 Oscillaria j Fragillaria ) n . 9 K Volvox / _, Dinobryon .. .. .. .. 0'3 Synedra .. .. .. .. .. 1-0 Peridinium, and probably the allied Ceratium . . 2'0 The microscopic appearances of some of these growths are shown in figs. 3 and 4 (see p. 76).
It will be noted that the dose varies greatly for the different kinds of growths, and unless the maximum dose is used, which would destroy fish, and be otherwise objectionable, there is always the chance, with lesser amo...unts, of paving the way for the active development of another kind of growth or growths, at the expense of those inhibited or killed. In interfering with the balance of Nature, it is difficult to foresee all the possible consequences.
It is possible, experimentally, to give a dose of copper sulphate just strong enough to restrain the development of asterionella in water, and yet insufficient to check the active growth of the slightly more hardy fragillaria. Nor is it altogether inconceivable, that starting with the delicate uroglena, one might, by varying the dose, induce one set of organisms to multiply and take its place in one reservoir, another lot in a second reservoir, yet another in a third reservoir, and so on.
What to read after Rivers As Sources of Water Supply?
You can find similar books in the "Read Also" column, or choose other free books by Alexander Cruikshank Houston to read onlineMoreLess
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