Source: The Geological Evidences of the Antiquity of Man (1863), Ch.20, p. 388
Context: So long as Geology had not lifted up a part of the veil... it was easy to treat these questions as too transcendental... But it is no longer possible to restrain curiosity from attempting to pry into the relations which connect the present state of the animal and vegetable worlds, as well as of the various races of mankind, with the state of the fauna and flora which immediately preceded.
A Defence of Poetry http://www.bartleby.com/27/23.html (1821)
“Long question is a veiled statement, same as criticism is a veiled wish.”
Source: Dust Tracks on a Road (1942), Ch. 10 : Research, p. 143
"Letter to Joseph Priestley" in response to Priestley's "experiments on the restoration of air [by plants] made noxious by animals breathing it, or putrefying it..." read in Philosophical Transactions LXII 147-267 of the Royal Society (1772) and quoted in John Towill Rutt, Life and Correspondence of Joseph Priestley http://books.google.com/books?id=psMGAAAAQAAJ... Vol.1 (1831).
Context: That the vegetable creation should restore the air which is spoiled by the animal part of it, looks like a rational system, and seems to be of a piece with the rest. Thus fire purifies water all the world over. It purifies it by distillation, when it raises it in vapours, and lets it fall in rain; and farther still by filtration, when keeping it fluid, it suffers that rain to percolate the earth. We knew before that putrid animal substances were converted into sweet vegetables when mixed with the earth and applied as manure; and now, it seems, that the same putrid substances, mixed with the air, have a similar effect. The strong, thriving state of your mint, in putrid air, seems to show that the air is mended by taking something from it, and not by adding to it. I hope this will give some check to the rage of destroying trees that grow near houses, which has accompanied our late improvements in gardening, from an opinion of their being unwholesome. I am certain, from long observation, that there is nothing unhealthy in the air of woods; for we Americans have everywhere our country habitations in the midst of woods, and no people on earth enjoy better health or are more prolific.
underdetermination of a theory by observation
Source: "What is the Vienna Circle?" 2006, p. xi
Speech before Congress (3 December 1860).
Context: The course of events is so rapidly hastening forward that the emergency may soon arise when you may be called upon to decide the momentous question whether you possess the power by force of arms to compel a State to remain in the Union. I should feel myself recreant to my duty were I not to express an opinion on this important subject.
The question fairly stated is, Has the Constitution delegated to Congress the power to coerce a State into submission which is attempting to withdraw or has actually withdrawn from the Confederacy? If answered in the affirmative, it must be on the principle that the power has been conferred upon Congress to declare and to make war against a State. After much serious reflection I have arrived at the conclusion that no such power has been delegated to Congress or to any other department of the Federal Government. It is manifest upon an inspection of the Constitution that this is not among the specific and enumerated powers granted to Congress, and it is equally apparent that its exercise is not "necessary and proper for carrying into execution" any one of these powers. So far from this power having been delegated to Congress, it was expressly refused by the Convention which framed the Constitution.
The Psychology of the Unconscious (1943)
Source: The Mind and the Brain, 1907, p. 27
