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The arguments of the French astronomers and mathematicians, which, at the end of the last century, were held to demonstrate the existence of a compensating arrangement among the celestial bodies, whereby all perturbations eventually reduced themselves to oscillations on each side of a mean position, and the stability of the solar system was secured, had evidently taken strong hold of Hutton's mind.
He did yet more, for he brought to the ideas of Maxwell the most striking confirmation by his memorable researches on electric oscillations. The experiments of Hertz are well known.
The stony strata that form the crust of our planet, are alone accessible to our examination; and we now know that the mean temperature of these strata varies not only with latitudes and heights, but that, according to the position of the several places, it performs also, in the space of a year, regular oscillations round the mean heat of the neighbouring atmosphere.
As the electric oscillations surge to and fro in the circuit it is opposed by the action of the ether which surrounds it and electric waves are set up in and sent out through it and this transformation soon uses up the energy of the current that flows in the circuit.
The aerial wire is precisely the same for either wireless telegraphy or wireless telephony. The transmitter of a wireless telegraph set generally uses a spark gap for setting up the electric oscillations, while usually for wireless telephony a vacuum tube is employed for this purpose.
Yet geology demonstrates that the persistency of subterranean movements in one direction has not been perpetual throughout all past time. There have been great oscillations of level, by which a surface of dry land has been submerged to a depth of several thousand feet, and then at a period long subsequent raised again and made to emerge.
Of the various movements of the crust due to internal agencies we will consider first those called oscillations, which lift or depress large areas so slowly that a long time is needed to produce perceptible changes of level, and which leave the strata in nearly their original horizontal attitude.
Do not hit at all if it can be avoided; but never hit softly. Like most young men in politics, I went through various oscillations of feeling before I "found myself." At one period I became so impressed with the virtue of complete independence that I proceeded to act on each case purely as I personally viewed it, without paying any heed to the principles and prejudices of others.
In other words, how far are those sociologists right who are convinced that by the technical complexity of modern life, with all its comforts and mechanizations, the level of individual life is raised, but that the oscillations about this average level remain the same and produce the same amount of pleasure and pain? The technical advance would therefore bring no increase of human pleasure.
Which of these is the most important no one can tell in a general way, for it is very difficult to say anything in general of their strength, and still more difficult to compare the strength of one with that of another. The best plan is not to undervalue any of them, a fault which human judgment is prone to, sometimes on one side, sometimes on another, in its whimsical oscillations.
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