Publisher's Synopsis
Excerpt from Second Treatise on the Decrease of Water in Springs, Creeks, and Rivers: Contemporaneously With an Increase in Height of Floods in Cultivated Countries
In that treatise I also thoroughly discussed the causes of this peculiar hydraulic phenomenon, and finally proposed measures and precautions to prevent as far as possible the further spread of this calamity, so threatening to future generations.
Since the publication of that treatise, this hydraulic question thus raised by me has been industriously studied in nearly all countries partly by scientific institutes and partly by individual naturalists and experts, and their various opinions and views have been published.
In by far the greater number of the opinions which have thus ap peered some of these scientific institutions and authors have entirely, and others' only partially, agreed with my views, conclusions, and the theory which I recommend, and, at the same time, have brought for ward many new illustrations and arguments to establish its correctness.
But especially, as several engineers and hydraulic experts have expressed the opinion that my conclusions as to the decrease in the height of water in rivers are unreliable, and that the remaining proofs for the decrease in discharge are not quite unassailable, and, besides, because several of these experts have even advanced the new theory that the established decrease in the height of the water is not in conso quence of the decreased discharge, but rather due to changes in and particularly to the deepening of the river beds, I have during six years shunned neither labor nor expense in obtaining as many and reliable technical hydraulic measurements and data as possible of different streams, so that I might clearly ascertain whether the views previously expressed by me or those of my opponents were more nearly correct.
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