Frequently, indeed, it would seem as if the overthrow of the trees, by Obstructing the drainage of the country, had given rise to a marsh, and the consequent formation of peat.
"Geology"
James Geikie
Its true design was to guard against the doctrines and principles prevalent in the non-slaveholding States, by preventing them from intermeddling with, or Obstructing, or abolishing, the rights of the owners of slaves.
"Slavery and the Constitution"
William Ingersoll Bowditch
Disease of the right side of the heart or of the lungs, by Obstructing the onward flow of blood from the veins, increases the blood pressure in the kidneys and produces disorder and excessive secretion.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler