Table II. d r/R ρ λ μ k σ 33 1.00 3.320 0.74 0.63 1.16 0.269 96 0.99 3.379 0.80 0.67 1.24 0.272 160 0.98 3.436 0.86 0.71 1.33 0.274 223 0.97 3.491 0.92 0.75 1.42 0.276 286 0.96 3.543 0.99 0.80 1.52 0.277 350 0.95 3.594 1.06 0.85 1.62 0.278 413 0.94 3.643 1.14 0.90 1.73 0.280 476 0.93 3.824 1.35 1.05 2.04 0.283 540 0.92 3.988 1.54 1.19 2.33 0.283 603 0.91 4.136 1.70 1.33 2.58 0.282 666 0.90 4.267 1.84 1.46 2.81 0.279 731 0.89 4.383 1.95 1.58 3.00 0.277 794 0.88 4.480 2.05 1.68 3.17 0.275 921 0.86 4.624 2.23 1.83 3.45 0.275 1047 0.84 4.708 2.38 1.92 3.66 0.277 1174 0.82 4.785 2.51 2.01 3.85 0.278 1301 0.80 4.859 2.64 2.09 4.04 0.279 1427 0.78 4.931 2.79 2.17 4.24 0.281 1554 0.76 5.002 2.94 2.25 4.44 0.283 1681 0.74 5.070 3.10 2.32 4.66 0.285 1807 0.72 5.137 3.28 2.40 4.88 0.288 1934 0.70 5.204 3.46 2.47 5.11 0.291 2061 0.68 5.269 3.63 2.55 5.33 0.293 2188 0.66 5.333 3.79 2.62 5.54 0.295 2315 0.64 5.396 3.95 2.70 5.75 0.297 2442 0.62 5.459 4.12 2.78 5.97 0.299 2568 0.60 5.521 4.28 2.86 6.18 0.300 2695 0.58 5.583 4.44 2.94 6.39 0.301 2822 0.56 5.645 4.48 3.02 6.49 0.299 2885 0.55 5.676 4.49 3.03 6.51 0.299 References. Bullen, K. E., 1940. The Problem of the Earth's Density Variation, Bulletin of Seismological Assocn. of America, vol. 30, no. 3. Gutenberg, B., and Richter, C. F., 1939. On Seismic Waves (Fourth Paper), Gerlands Beiträge zur Geophysik, vol. 54, pp. 94–136. Jeffreys, H., 1939. The Times of PcP and ScS, M.N.R.A.S. Geophysical Supplement, vol. 4, pp. 537–547. — 1939A. The Times of P, S and SKS, and the Velocities of P and S, M.N.R.A.S. Geophys. Suppl., vol. 4, pp. 498–533.