"The modern concept of the vacuum of space, confirmed every day by experiment, is a relativistic ether. But we do not …"

"A thinker sees his own actions as experiments and questions — as attempts to find out something. Success and failure …"

"I wish that people would be persuaded that psychological experiments, especially those on the complex functions, are …"

"Science … is to be regarded as a series of interconnected conceptual schemes which arose originally from experimentat…"

"we are engaged in a grim experiment never before attempted. We are subjecting whole populations to exposure to chemic…"

"To engage in experiments on heat was always one of my most agreeable employments."

"great difficulties are felt at first and these cannot be overcome except by starting from experiments .. and then be …"

"The history of these experiments is not a proud one. The Nazis specialised in them, with a view to eradicating homose…"

"Mere numbers cannot bring out... the intimate essence of the experiment. This conviction comes naturally when one wat…"

"Play is experimenting with the accident."