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Self-adjusting Bearings for the Shafts of Machinery A frequent cause of undue friction and heating of rapidly rotating machinery arises from some inaccuracy or want of due parallelism between the rotating shaft or spindle and its bearing. This is occasioned in most cases by some accidental change in the level of the supports of the bearings.
Hybrids from two species which are very difficult to cross, and which rarely produce any offspring, are generally very sterile; but the parallelism between the difficulty of making a first cross, and the sterility of the hybrids thus produced two classes of facts which are generally confounded together is by no means strict.
that is, of dwelling on the sound of his own name, was familiar to the Arabs. M. Lefebure has drawn my attention to a passage in the works of a mediaeval Arab philosopher, Ibn Khaldoun: "To arrive at the highest degree of inspiration of which he is capable, the diviner should have recourse to the use of certain phrases marked by a peculiar cadence and parallelism.
In my idea, the currents which pass through the cerebral mass follow each other without interruption, from the sensorial periphery to the motor periphery; it is they, and they alone, which excite the movements of the body by acting on the muscles. Parallelism recognises all these things, and I do likewise. Let us now see the advantages of this new system.
But to get further back we must look into the world of the invisible, and it is here that psychological study comes to our aid. We cannot, however, study the invisible side of Nature by working from the outside and so at this point of our studies we find the use of the time-honored teaching regarding the parallelism between the Macrocosm and the Microcosm.
Even if the few fossil species which are common to the Old and New Worlds were kept wholly out of view, the general parallelism in the successive forms of life, in the palaeozoic and tertiary stages, would still be manifest, and the several formations could be easily correlated.
You will observe the reiteration of the same earnest cry in all these clauses, and if you glance over the remainder of this psalm, you will find that he asks for the gifts of God's Spirit, with a similar threefold repetition. Now this characteristic of the whole psalm is worth notice in the outset. It is not a mere piece of Hebrew parallelism.
These hosts of men whom I saw thus occupied since history began were authors; these vessels were books; these heaps of refuse in the bays were great libraries. The allegory admits of any amount of ingenious parallelism. It is nevertheless misleading; it is the illusion of an idle fancy.
There is in that country a rectilinear continuity of mountains, and a parallelism among the ridges, no where else to be observed, at least not in such a great degree. At neither end of those parallel ridges is there a direct conveyance for the waters to the sea. At the south end, the Allegany ridge runs across the other parallel ridges, and shuts up the passage of the water in that direction.
One of the most puzzling cases of phonetic parallelism is afforded by a large number of American Indian languages spoken west of the Rockies. Even at the most radical estimate there are at least four totally unrelated linguistic stocks represented in the region from southern Alaska to central California.
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