Errata1. Page 170 near bottom of second column-equa-tion should read

ER2 = JR2 = p2EAopl+ Alp + A2

2. Page 175, fifth line from bottom of first columnthe second remainder should be k3 - a(k - 3a)

3. Page 175, Appendix III-equations should becorrected as follows

n 1

PI + K,P2 + K3P + K4 -(a )2-2

+-+ _+ -1- (-B+-)'+ R (1)2co(a -0a ,-w)-2w(a w_

R = - for n = 0; R = 0 for n = 1, 2, or 3K(4Where PI = a, P2 = - +jw, and P3 = -,B-jc

s4awAd~ ~ ~~~A6ei d

e-cat _e-,tPs + K2P2 + KJP + K14 (a - 3)2 + w2 -

Ccoswt+$ sinwt] (3)

p2 1 1 should beP3 + K2P2 + KP 4 (a )2 + 2

[-5ae 9-a cos ot -+ sin (of (4)

pl = (ag)n- lecat

P4+ K2P'+KK3P +K4P+K A +

+ +

( + R (6)A, As, A4

1 SAouIJ be 4g)R =forn O R = O for n = 1, 2ar 4

A,= a2(6+ y+ 5)-( y + 76) + ^y8As= -3 j2(a + y+ )-.j(aCy + a6 + -ya) + a-y8As- - + y2(a + t + y)- (a + aa + ,B3) + a,j3A4 = 3 + 52(a + j6 + y) -8(a,3 + ay + 0jy) + aO3y

,shjou/c/a' bej-a

-612-'

PI + K2P3 + K3P2 + KIP + K, a + A A72 + As'

[A7 cos ct + As sin ct] (8)

4. Page 258, Table I-second item in last columnshould be 1.02

5. Page 770 title of paper by D. C. Jackson shouldbe "The Evolution of Engineering Education."

6. Page 1316, 21st line from top of second columnshould read "<general constants of ...."