[Bubier], Edward Trevert, 1858- [from old catalog] · Lynn, Mass., Bubier pub. co. · leaf 248
thode. The anode is the point where thecurrent enters the tube. The cathode is the point 246 ELECTRICITY AND ITS where the current leaves. Hence, either electrodeof the tube may be made the cathode by simplyreversing the direction of the current. A goodtube not more than two inches in diameter,… … FIGURE I. coil should give a spark from three to ten inches.By this we mean that the secondary currentshould jump in the air the distance between theelectrodes of the coil the above number of inches.If there is a blue glow that shows in a tube, it willnot produce X-Rays. What light there is to…
Electricity
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