TABLE X (Continued) Silicon Dioxide (Glass) ev M-1 A n k 504 24.60 0.99884 1.76 492 25.20 0.99878 1.91 480 25.83 0.99872 2.08 469 26.43 0.99866 2.26 458 27.07 0.99859 2.45 447 27.74 0.99852 2.67 436 28.44 0.99845 2.90 426 29.10 0.99837 3.15 415 29.87 0.99828 3.44 406 30.54 0.99821 3.71 396 31.31 0.99812 4.04 386 32.12 0.99802 4.40 377 32.89 0.99792 4.77 368 33.69 0.99782 5.18 359 34.53 0.99771 5.63 351 35.32 0.99760 6.07 342 36.25 0.99747 6.62 334 37.12 0.99735 7.17 326 38.03 0.99722 7.77 318 38.99 0.99708 8.44 311 39.86 0.99695 9.09 303 40.92 0.99678 9.91 X 10-4 296 41.88 0.99663 1.07 x 10-' 289 42.90 0.99646 1.16 282 43.96 0.99629 1.25 275 45.08 0.99609 1.36 269 46.09 0.99592 1.46 262 47.32 0.99570 1.59 256 48.43 0.99549 1.71 250 49.59 0.99527 1.85 244 50.81 0.99504 2.00 238 52.09 0.99478 2.16 232 53.44 0.99451 2.34 227 54.62 0.99427 2.50 221 56.10 0.99395 2.72 216 57.40 0.99367 2.92 211 58.76 0.99336 3.14 206 60.18 0.99304 3.37 201 61.68 0.99269 3.63 196 63.25 0.99231 3.90 191 64.91 0.99190 4.21 187 66.30 0.99155 4.47 182 68.12 0.99108 4.82 178 69.65 0.99068 5.11 174 71.25 0.99024 5.44 170 72.93 0.9898 5.80 (continued