LXIX. The absorption of Röntgen rays

The Absorption el R6ntgen Rays.739 bars.In plotting the ~-~rd'curves for these particular bars, it was possible in two cases only to distinguish the curves from those for the square bars, and in these two cases the difference was extremely small.For equal values of the ratio of l to v/A, it was found in general that the self-demagnetizing factor, for bars having a sectional ratio of 2 to 1, was about 93 per cent. of that for bars of square section ; while for flat bars, having a sectional ratio of 10 to 1, the value of the self-demagnetizing factor went down to about 75 per cent. of that for bars of square section.