234 clay * 400 0.355 410 0.378 420 0.418 430 0.464 440 0.499 450 0.528 460 0.549 470 0.567 480 0.582 490 0.599 500 0.610 510 0.623 520 0.633 530 0.642 540 0.651 550 0.661 560 0.669 570 0.675 580 0.681 590 0.690 600 0.700 610 0.710 620 0.721 630 0.732 640 0.743 650 0.757