Fig. ]. Fig. 2. 



( ] ) r=.0.17, r=r.7, w = 25. (1) r=0.17, T= (f. 7, w = 2b. 



(2) r = 0.24, T = 7°.2, w = 25. (2) r^0A7, T= Kf.Q, w = 2ô. 



(;3) r=0.:3G, T=-^.S, w = 25. (3) r = 0.17, r= SUl", ?ü = 25. 



(i) r=0.17, r=l(32r, i<; = 25. 



Fig. 3. Fig. 4. 



(1 ) r=0.25, T= 626°, w = 2-). (1) r-0.l7, r = 2548^ iv= 25. 



(2) r = 0.20, r=l'269^ m; = 25. (2) rr^0.\7,T= 0^, iv = U2. 



(;]) r-n.a5, 7-1349°, iü = 2b. (3) r=0.17, r= 583', w = 342. 



Fig. 5. Fig. 6. 



(1) r = 0.36, r=: 4°.3, «0 = 218. (1) r=0.17, ^=18^5, «; = 156. 



(2) r=0.20, T= 22.°, iü = 218. (2) r=0.17, r= 584°, mj = 156. 



(3) r = 0.20, r=16^7, ?ü-411. (3) r = 0.17, r= 260°, it'-342. 



(4) /•= 0.20, r= 968°, t<;:-218. (4) /• = 0.17, 2'- 583°, w = 342. 



r gives radius in mm., 



T „ permanent twist in degrees, 



tu „ longitudinal stress in grm. weight. 



