值(αn＝20°)
β		差值	β		差值	β		差值	β		差值
8° 8°20′ 8°40′ 9° 9°20′ 9°40′ 10° 10°20′ 10°40′ 11° 11°20′ 11°40′ 12° 12°20′ 12°40′ 13° 13°20′ 13°40′ 14° 14°20′ 14°40′ 15° 15°20′ 15°40′ 16° 16°20′ 16°40′ 17°	1.0283 1.0308 1.0333 1.0360 1.0388 1.0417 1.0447 1.0478 1.0510 1.0544 1.0578 1.0614 1.0651 1.0689 1.0728 1.0769 1.0811 1.0854 1.0898 1.0944 1.0991 1.1039 1.1089 1.1140 1.1192 1.1246 1.1302 1.1358	0.0025 0.0025 0.0027 0.0028 0.0029 0.0030 0.0031 0.0032 0.0034 0.0034 0.0036 0.0037 0.0038 0.0039 0.0041 0.0042 0.0043 0.0044 0.0046 0.0047 0.0048 0.0050 0.0051 0.0052 0.0054 0.0056 0.0056	17° 17°20′ 17°40′ 18° 18°20′ 18°40′ 19° 19°20′ 19°40′ 20° 20°20′ 20°40′ 21° 21°20′ 21°40′ 22° 22°20′ 22°40′ 23° 23°20′ 23°40′ 24° 24°20′ 24°40′ 25°	1.1358 1.1417 1.1476 1.1537 1.1600 1.1665 1.1731 1.1798 1.1867 1.1938 1.2011 1.2085 1.2162 1.2240 1.2319 1.2401 1.2485 1.2570 1.2658 1.2747 1.2839 1.2933 1.3029 1.3127 1.3227	0.0059 0.0059 0.0061 0.0063 0.0065 0.0066 0.0067 0.0069 0.0071 0.0073 0.0074 0.0077 0.0078 0.0079 0.0082 0.0084 0.0085 0.0088 0.0089 0.0092 0.0094 0.0096 0.0098 0.0100	25° 25°20′ 25°40′ 26° 26°20′ 26°40′ 27° 27°20′ 27°40′ 28° 28°20′ 28°40′ 29° 29°20′ 29°40′ 30° 30°20′ 30°40′ 31° 31°20′ 31°40′ 32°	1.3227 1.3330 1.3435 1.3542 1.3652 1.3765 1.3880 1.3997 1.4117 1.4240 1.4366 1.4494 1.4626 1.4760 1.4898 1.5038 1.5182 1.5329 1.5479 1.5633 1.5791 1.5952	0.0103 0.0105 0.0107 0.0110 0.0113 0.0115 0.0117 0.0120 0.0123 0.0126 0.0128 0.0132 0.0134 0.0138 0.0140 0.0144 0.0147 0.0150 0.0154 0.0158 0.0161	32° 32°20′ 32°40′ 33° 33°20′ 33°40′ 34° 34°20′ 34°40′ 35° 35°20′ 35°40′ 36° 36°20′ 36°40′ 37° 37°20′ 37°40′ 38° 38°20′ 38°40′ 39°	1.5952 1.6116 1.6285 1.6457 1.6634 1.6814 1.6999 1.7188 1.7381 1.7579 1.7782 1.7989 1.8201 1.8419 1.8641 1.8869 1.9102 1.9341 1.9586 1.9837 2.0093 2.0356	0.0164 0.0169 0.0172 0.0177 0.0180 0.0185 0.0189 0.0193 0.0198 0.0203 0.0207 0.0212 0.0218 0.0222 0.0228 0.0233 0.0239 0.0245 0.0251 0.0256 0.0263