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Updated: May 27, 2025
I shall attempt, therefore, in this discussion, to do three things, tho I shall not try to separate the three spatially: to discuss this marking system on its merits; to report to the educational world our findings after an experience with it of five years, and to urge against its extension into the secondary field.
Thus no one of the 60 announcements which we used was spatially favored above another. Thirty persons took part in the experiment. Each one had to devote himself to the 60 pages in such a way that every page was looked at for exactly 20 seconds. Between each two pages was a pause of 3 seconds, sufficient to allow one sheet to be laid aside and the next to be grasped.
In so far as scientific thought has held to purely spatial conceptions, it has been obliged to concentrate on ever smaller and smaller spatial sizes, so that the spatially conceived atom-picture has finally to reckon with dimensions wherein the old concept of space loses validity.
This fact, seen together with the characteristics of radioactivity, tells us that in such elements gravity has so far got the upper hand of levity that the physical substance is unable to persist as a spatially extended, coherent unit. It therefore falls asunder, with the liberated levity drawn into the process of dispersion. Seen thus, radioactivity becomes a symptom of the earth's old age.
It follows that the world of spatially extended bodies is a homogeneous and consistent whole, reflecting in its laws and forms the real operations by which it is constituted and sustained. But all this actual World is nevertheless phenomenal only, albeit the phenomena are derived from and related to the Real as change is to the thing which changes.
In contrast to this, the idea that the boundary of a luminous cone is spatially displaced when its expansion is hindered by an optical medium of some density, and that the measure of this displacement is equal to the shortening of depth which we experience in looking through this medium, is directly evident, since all its elements are taken from observation.
What is meant by asking whether this or that is "in" the mind? When people say that sensible qualities are in the mind, they do not mean "spatially contained in" in the sense in which the blackbirds were in the pie. We might regard the mind as an assemblage of particulars, namely, what would be called "states of mind," which would belong together in virtue of some specific common quality.
As a peregrinating, finite, spatially limited being, it is separated from all other living beings by inorganic, dead masses, and yet driven to contact with them by a fundamental impulse to assimilate them into itself, and make them part of itself.
We may therefore conclude that the same characteristics will apply to the way in which the blue of the sky and the yellow of the sunlight are encountered spatially. Now we need only observe how the blue heavens arch over us spherically, on the one hand, and how the yellow brightness of the sun penetrates the air ray-wise, on the other, in order to realize that this really is so.
Let us now see what we are really told by the number 186,000 miles a second, as the measure of the speed with which a light-impulse establishes itself spatially. In the preceding chapter we learnt that the earth's field of gravity offers a definite resistance to our visual ray. What is true for the inner light holds good equally for the outer light.
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