Tacit knowing and tactile knowledge as essential to understaning technology.
Have we "lost contact with the primary element" Jacques Ellul says?
What is the evidence for our having lost touch or been out-of-touch with the elements?
Ancient:Four elements: Air, Water, Earth, Fire,animistic theory gave way to organic order of the alchemists.Modern:Ninety-two Naturally occurring elements, from hydrogen to uranium and more....
secret of inventiveness
Ancient world of Greek science:
The "eureka effect" The story of Archimedes.
discovery of the principle of displacement
"was the result of an observation he made as he got into the water and noticed the level rise""
Gordon Glegg, "the secret of inventiveness is to fill the mind and the imagination with the context of the problem and then relax and think of something else."
"sometimes the subconscious will "hand-up " a picture of what the solution might be."
"The ability to recognize patterns of one kind or another is important in a variety of disciplines, and may be compared with the ability of a good engineer to evaluate a structural design "by the eye"."
reading x-rays is at first difficult and the role of tacit knowledge (acquired from experience, intuition and immersion).
"choices have to be made as to which conclusions are significant and then judgment is called for"
"One problem seems to be that the use of such equipment (any device) is sometimes associated with a narrowing of the focus of what one looks at. The equipment itself is part of the fascination, so one tends to look only at what it reveals."
"we were shown how to feel the soil between our fingers, thereby judging its sand, silt, and clay content."
"In many other jobs 'the living movement of his hand' and the rhythm of the work may help the author or craft worker maintain the flow of what is being done."
The wheelwright knew about the timber "not by theory, but more delicately, in his eyes and fingers."