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Updated: May 1, 2025
In seeking, for the purpose of this research, a fluid medium which shall possess analogous properties to the luminiferous ether, or whatever may be the medium whose vibrations render manifest certain physical phenomena, it might be considered at first sight that substances so dense as glycerin and sirup could have but little in common with the ether, and that an analogy between experiments made within it and phenomena associated with ethereal vibrations would be of a very feeble description: but Professor Bjerknes has shown that the chief requisite in such a medium is that its viscosity should be great, not absolutely, but large only in proportion to its density, and if the density be small, the necessary viscosity may be small also.
If this be so, then one would simply require to solidify or change the viscosity of this liquid. Would this be difficult? Probably not, for most of the body fluids are of that colloidal nature in which coagulation occurs in the presence of small quantities of special agents. Such a result might cause the individual to lose his equilibrium. This would prohibit all organised movement.
M. Tamman has demonstrated that amorphous solids may very well, in fact, be regarded as superposed liquids endowed with very great viscosity. But it is no longer the same thing when the solid is once in the crystallized state. There is then a solution of continuity of the various properties of the substance, and the two phases may co-exist.
This evanescence is owing to the viscosity of the air; but Helmholtz has shewn that in a perfect fluid such a whirling ring, if once generated, would go on whirling for ever, would always consist of the very same portion of the fluid which was first set whirling, and could never be cut in two by any natural cause.
Bennington became very impatient indeed, but he tackled Le Conte industriously, and did well enough until he tried to get it into his head why various things happen to glaciers. Then viscosity, the lines of swiftest motion, relegation, and directions of pressure came forth from the printed pages and mocked him. He arose in his might and went forth into the open air.
Oil, sweat, filth; or the sordes of the body: an excrementitious viscosity, the excrements of oil and other ointments used about the body, and mixed with the sordes of the body: all base and loathsome. And such almost is every part of our life; and every worldly object. XXIV. Lucilla buried Verus; then was Lucilla herself buried by others. So Secunda Maximus, then Secunda herself.
These are very rare, and the slope of the sides depends on the amount of original viscosity. Where the lava is highly fused its slope will be slight, but if in a viscous condition, successive outpourings from the orifice, unable to reach the base of the mountain, will tend to form a cone with increasing slope upwards.
The temperature at which the viscosity becomes stationary varies somewhat with different gums, but broadly speaking it lies between 60° C. and 90° C., no gums showing any marked decrease in viscosity between 80° C. and 90° C. The experiments we have made in this direction were conducted as follows.
This is because the friction and viscosity of the air robs the rings of their substance and energy. If the air were without friction this could not happen, and the rings would then be persistent, and would retain all their qualities.
Q. Why is the spittle of a man that is fasting more subtle than of one that is full? A. Because the spittle is without the viscosity of meat, which is wont to make the spittle of one who is full, gross and thick. Q. From whence proceeds the spittle of a man? A. From the froth of the lungs, which according to the physicians, is the seat of the phlegm.
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