rder that their contents may be Crookes tube. screen we interpose a thin piece of wood or even a box, ascertained without having to open them. The ex- the latter will arrest but a small number of X rays, the Such an arrangement is within the reach of every- periments are not confined to baggage,… … accumulators, B ; another, a special high tension explain the principle of the method. Let us transformer, C; and the third the tube that take a Crookes tubein which a vacuum up to produces the X rays, fixed upon a jointed support that a millionth of an atmosphere has been formed, and the part…
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