Philosophical Transactions of the Royal Society of London (Google eBook)

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Royal Society of London., 1887 - Mathematics
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Page 361 - O. Reynolds, On the Theory of Lubrication and its Application to Mr Beauchamp Tower's Experiments Including an Experimental Determination of the Viscosity of Olive Oil, Phil.
Page 791 - Now, no special adjustment was made to secure the strict horizontality of the movable disks, or at least none is mentioned ; the final adjustment is stated to have been that of the fixed disks, which were presumably adjusted to be parallel to the movable ones, and at the desired distance. Hence such small errors of level as that just mentioned may very well have occurred. SECOND NOTE. On the Effect of the Rotations of the Cylinders or Spheres round their own Axes in increasing the Logarithmic...
Page 686 - ... micro-millimetres. The abrupt commencement, and the permanent stability, of the black film demonstrate a proposition of fundamental importance in the molecular theory: The tension of the film, which is sensibly constant when the thickness exceeds fifty micro-millimetres, diminishes to a minimum, and begins to increase again when the thickness is diminished to ten micro-millimetres.
Page 770 - ... given in Table I, I wished to make some independent observations on the viscosity of air for the purpose of ascertaining how far these would agree with those of Maxwell, in which I was inclined to place great confidence. Maxwell employed the method of torsional vibrations of disks placed each between two parallel fixed disks at a small, but easily measurable distance, in which case, when the period of vibration is long, the mathematical difficulties of determining the motion of the air are greatly...
Page 460 - I find the addition of nitric acid is not necessary to be present whilst the emulsion is being formed, though in the subsequent washings it is convenient to use it. This may be avoided, however, by washing first with water, and using a dilute solution of iodine to eliminate the veil which is nearly always present when the emulsion is boiled.
Page 834 - ... also a very remarkable fatigue of elasticity, according to which a wire which had been kept vibrating for several hours or days through a certain range came to rest much quicker when left to itself than when set in vibration after it had been at rest for several days and then immediately left to itself.
Page 769 - ... the different parts of the stratum has taken up its final velocity, then the velocity of the air will increase uniformly as we pass from the lower plane to the upper. If the air in contact with the planes has the same velocity as the planes themselves, then the velocity will increase v/r centimetres per second for every centimetre we ascend.
Page 686 - ... quite insensible : we may feel very confident that it differs, by but a small percentage, from the exceedingly small force of attraction which we should calculate for it according to the Newtonian law, on the supposition of perfect uniformity of density in each of the attracting bodies.
Page 633 - ... a soap-bubble. In such a film it is possible that no part of the liquid may be so far from the surface as to have the potential and density corresponding to what we have called the interior of a liquid mass, and measurements of the tension of the film when drawn out to different degrees of thinness may possibly lead to an estimate of the range of the molecular forces, or at least of the depth within a liquid mass, at which its properties become sensibly uniform. We shall therefore indicate a...
Page 746 - ... in the ventricles of the brain, and the central canal of the spinal cord ; and in the convoluted tubules of the kidney.

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