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I® CUBIC SYSTEM. 60. In the form dikl (fig. 26), COSE = P v + ¥ + r Fia. 20. COS G COST ¥ + 2 hi ' ¥ + r ¥ - 2kl ¥~+~¥~+ In the form ,-321, f = 21 ° 47', a = 21 0 4,7' T~ 4.1 j? __ ? A *' > / “A X I ^ In the form *531, f = 27° 40 ', 61. In the form vlkh (fig. 27), ,¥ + ¥ — P G = 27° 40', T = 69° 5 . T = 57° 7'. FIG. 27. COSD COSW COSU F + ¥ + P’ _¥ - ¥ + V V + ¥ + P’ kl 111 -j.- 1J C v~T~W~^rT‘- In he form .123, d = 30° o', w = M o 87 ', In he form .m, d = 25° 13', w = S i°45' In the form .135, u = 19° 28 ', W=60 o 6c ; forming the sohd'anglT in^hLh °tta T’ ***’ “* faC ° S ° f * il ’ upon each of the angfes of 100. 8 r > G mcet > a PP car U = 38° 13'. U = 48° ll'. U = 48° 55'. 321.100 421.100 431.100 631.100 731.100 : 36 0 ° < 321,010 = 67° 41', 32!,001 = 74° 30'. 29^ 12, 421,010 = 04° 421,001 = 77° 24'. ■ 38° 20', 431,010 = 53° 58', 431,001 = 78° 4l'. 32 0 19 ,’ 531,010 = 600 32', 531,001 = 80° 10'. 24 18 , 731,010 = 07 0 73i ;0 oi = 82° 3l'. latter, forming 1 the solicf 1 ^ 10 ° aiul K ^’ 1, six facea of tho appear upon tt thfi CdgG8 *’ 0 ™ et > '®noSg n t*e°” oh 0 j “ d ‘Ireo fa»™ of upon eoeh of the angles of100° tllC u mcet ’ “Pl'eor
