The London, Edinburgh and Dublin philosophical magazine and journal of science . f regulated small deviations forthe artiads and another set for the perissads : with all theconsequences of this suggestive fact. The lawTs of thedeviations were less satisfactorily worked out ; enough, how-ever, to show the marked difference between them, and someof their main features, including a predominance in both ofa period of 18 places of the Mendeleeff series. Persons making use of the diagram in last months are requested to insert upon it the following approxi-mate atomic -weights. Xeon . . 20
The London, Edinburgh and Dublin philosophical magazine and journal of science . f regulated small deviations forthe artiads and another set for the perissads : with all theconsequences of this suggestive fact. The lawTs of thedeviations were less satisfactorily worked out ; enough, how-ever, to show the marked difference between them, and someof their main features, including a predominance in both ofa period of 18 places of the Mendeleeff series. Persons making use of the diagram in last months are requested to insert upon it the following approxi-mate atomic -weights. Xeon . . 20 Helium . . 4 Krypton . . 81 Argon . . 396 Xenon. . 127 I remain, Gentlemen,30 Ledbury Road. W. Faithfully yours, September 1902. G. JOHNSTONE STONEY. Phil. Mag. S. 6. Vol. 4. No. , Oct. 1902. 2 L [ 506 ] LV. Rotating Earth-Inductor ivitlwut J. J. Taudin Chabot*. ^f^HE solenoid of the earth-inductor is divided into two parts, A shown at a and av Both these parts are mounted on an axis x or, the middle portion of which rests in a bearing which. * Communicated by the Author. On the Jacobian of the Primary Minors. 507 is rigidly connected with the end of the axis y y. At b thereis a bevel-wheel connected to the stationary base of theinstrument; at bl there is a similar wheel, having an equalnumber of teeth, fixed to the axis x x. At c there is an oil-reservoir for lubricating the bearings. A flexible thin-wirecable is used as a connector; this is at one end joined to apoint in the prolongation of y y, and at the other, after being-led through the hollow axis xx, is connected at a, /3, 7, 8 tothe windings in ax and a. If now the axis y y is made to rotate, then the axis x x must,on account of its being geared through b bu make one revo-lution for each revolution of y y, so as to leave the flexiblecable untwisted. Hence if the yy axis be placed verticallyor horizontally in the magnetic equatorial plane of the earthsfield, its rotation will induce currents in th
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectscience, bookyear1840
