. The London, Edinburgh and Dublin philosophical magazine and journal of science. axes of x and y is given in fig. 7. These curves could havebeen obtained bv means of fig. 4, but as a check on the 2 A2 328 The Propagation of Light in Biaccals. accuracy of the arithmetic they were calculated independentlyand the results were compared with those from fig. 4. Section by a Plane at 45° to axes of x and y andpassing through axis of z. Inner. Outer. y- z* y- z. o-oo 3-00 o-oo 4-00 1-00 2-70 1-00 3-70 1-57 2-00 1-91 3-00 1-90 1-00 2-00 2-91 2-00 0-00 2-79 2-00 3-00 1-63 3-25 1-00 3-39 o-oo Another se


. The London, Edinburgh and Dublin philosophical magazine and journal of science. axes of x and y is given in fig. 7. These curves could havebeen obtained bv means of fig. 4, but as a check on the 2 A2 328 The Propagation of Light in Biaccals. accuracy of the arithmetic they were calculated independentlyand the results were compared with those from fig. 4. Section by a Plane at 45° to axes of x and y andpassing through axis of z. Inner. Outer. y- z* y- z. o-oo 3-00 o-oo 4-00 1-00 2-70 1-00 3-70 1-57 2-00 1-91 3-00 1-90 1-00 2-00 2-91 2-00 0-00 2-79 2-00 3-00 1-63 3-25 1-00 3-39 o-oo Another section of the surface which is of interest is that Fie:. taken through a singular point and containing the axis of curves thus obtained are shown in fig. 8. If the axis of On the Steady Motion of an Electrified Ellipsoid. 329single-ray velocity be taken as the axis of x we have (°^xm + b2A {x* +y2) -2aW2-b*(o2 + d2),/ + aW = 0 as the equation to the curves. Section containing the axis of single-ray velocity andthe axis of y. Inner . i Outer . x y- x. y- 0-00 2-00 o-oo 4-00 1-00 1-85 1-00 3-85 M6 1-80 1-16 3-80 1-59 1-59 2-00 1-33 2-00 3-32 2-32 1-05 2-322-65 3-032-65 2-37 1-00 3-18 1-00 2-75 0-50 3-14 0-50 3-00 o-oo 3-00 0-00 and 1-97 Angles are given to the nearest 10, and the other numbersto the second decimal place. XL 11. On the Steady Motion of an Electrified G. F. C. Searle, , Demonstrator in ExperimentalPhysics, Cavendish Laboratory, Cambridge *. AT the Meeting of the Royal Society on 19th March,1896, I read a paper on Problems in Electric Con-vection. The first part of the paper is printed in thePhilosophical


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