1462 
defines an equation. From the first equation we obtain z,, from the 
second equation z,, etc. 
TAB ETA 
Average Radiating Power per Unit of 
Distance of Zone Surface Diskatce 
oe ; ‘from Centre 
Centre of Found directly from the dee ee af of Disk 
Del Enne value graphica! . 
q at Centre Interpolation 
0.9875 | Xi ONS 125 48.6 40.0 1.0 
0.9625 Xo 02254: 58.5 
| 61.0 0.95 
0.9375 x3 OA 63.9 
0.9125 | x, = 0.2631 68.4 69.0 0.9 
0.875 Xs cole 73.0 
1422 0.85 
0.825 xe 50-2000 | 1 ase 
| 0.3038 j 71.8 0.8 
075 La = OSD 79.8 
(0.3103 | 
80.7 0:75 
0.65 A | — 0.3263 84.8 
19.3305 | Wases 0.7 
ee 
0.55 i = > == 10, S447 | 89.5 81.4 0.6 
10.3432 | | 
‚0-5519 | 91.0 055 
10.3562 | 
03.8 0.4 
0.3656 
he Sed 96.5 0.3 
0.3 ry, = " ? = 0.3691 95.9 
peel | 
98.3 0.2 
0.3934 
0.3817 99.5 0.1 
0.125 a= loser) = 0.3840 99.8 
100.0 0.0 
0.3860 
The results are collected in the second column of Table III. The 
third column shows the same values converted into percentages of 
the intensity prevailing in the centre of the disk. After they had 
been plotted on millimeter paper, a smooth curve was drawn, 
fitting the points as well as possible. On this ‘‘distribution-curve” 
the numbers of the fourth column were read as ordinates, belonging 
