45, 152, Ans. B=52° 54′ 30′′ C=60° 45'.

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46, line 25, for

47° 0' 30"

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64, Ex. 183,

74, Prob. 5, Ans. 1100.1.

78, 20, for BAC read BAH.

80,

89,

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21, Ans. BD=498.7.

79, for xy=(b+a) read xy=4(b+a).

92, line 3 from bottom, for n read m.

100, Prob. 104, for a=18° 45' read a=42° 30'.

101, 110, Ans. 147° 16'.

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