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Just as with space, whose separating of things seems exactly on a par with its uniting of them, but sometimes one function and sometimes the other is what come home to us most, so, in our general dealings with the world of influences, we now need conductors and now need non-conductors, and wisdom lies in knowing which is which at the appropriate moment.
But how did it occur to you, Madame Merton, to use the ashes as you did?" "Let me answer," said the colonel. "Any American would know how completely ashes are non-conductors of heat. I knew of their use on one occasion in our Civil War to hide and preserve the safe-conduct of a spy."
Dr Baraduc states that he is investigating the subtle forces by which the soul defined as the intelligence working between the body and the spirit expresses itself, by seeking to record its movements by means of a needle, its "luminous" but invisible vibrations by impressions on sensitive plates. He shuts out by non-conductors electricity and heat.
The feathers of these Arctic wanderers are perfect non-conductors of heat and of cold, and never a chill reaches their little frames until hunger presses. Then they must find food and quickly, or they die.
Oh no! but what dull ache is this in that obscurely sensitive region, somewhere below the heart, where the nervous centre called the semilunar ganglion lies unconscious of itself until a great grief or a mastering anxiety reaches it through all the non-conductors which isolate it from ordinary impressions?
As cold water is one of the best non-conductors of heat, the Gulf Stream is thus prevented from losing its caloric on its way across the Atlantic to ameliorate the climates of the western coasts of Europe, and moderate the bitterness of the northern seas.
Fitzgerald, of Dublin, has examined the question mathematically, and has shown that Maxwell's theory would have enabled Dr. Kerr's result to be predicted. Another requirement of the theory is that bodies which are transparent to light must be insulators or non-conductors of electricity, and that conductors of electricity are necessarily opaque to light.
Stiff, high collars are injurious, because they are irritants to blood-vessels and nerves and are non-conductors. Collars should be worn from a quarter to half an inch away from the skin, for the less the Adam's apple the highest forward point of the larynx is irritated, the better.
One of the difficulties of these experiments consisted in this, that, while the Spark runs readily along one class of substances, he cannot, or will not, run along others. Substances of the first class, comprising the metals, are called conductors; those of the second class, embracing, among other things, all resinous substances, are styled non-conductors. Now, water is a good conductor.
Gloves are good to keep out the cold and make one look well, but have them so they can easily be removed, as they should be, for they are non-conductors of Christian magnetism. Make bare the hand. Place it in the palm of your friend. Clench the fingers across the back part of the hand you grip.
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