Plate XXIX. 



Fig. 



Fig- 



Fig. 



J.— Obtained by twisting iron wire (r = 0.62) in varying mag- 

 netizing fields. 

 Curve I. for r — ±15° ; Curve II. for r = ±30° ; 



„ III. „ r = ±60' ; „ IV. „ r = ±90\ 



77. — Obtained by twisting iron wire (r= 0.62), r being variable. 



Curve I. for£ = 2.3; Curve II. for 0= 5.3; 



„ III. „ = 20.7; „ IV; „ = 58.2; 



„ V. „ ö= 2.4,.w=4kg.; „ VI. „ = 2.4,w=8kg.; 

 „ VII. „ 6 = 5.3, w =8 kg. 



III. — Obtained by reversing the direction of the magnetizing 

 force with iron wire (r = 0.62), fè being variable. 

 Curve I. for r = ± 5° ; Curve II. for r = ± 1 5° ; 



III. 



V. 



r = ± 30°; 

 r = + 120°. 



IV. 



r= 



±(30°; 



Fig. 



IV — Obtained by reversal with iron wire (r = 0.62), r being 

 variable. 



Fig. 



Curve I. for£=± 1.6 

 „ III. „ 6 = ± 8.2 

 „ V. „ $ = ±51.8 

 „ VII. „ S=± 9.(3 



V. — Obtained by reversal for 

 being variable. 

 Curve I. for r=0.44; 

 „ III. „ r=0.77; 



Curve- II. for£ = ± 5.2; 

 „ IV. „ »=±13.0; 



„ VI. „ ö = ± 5.1, to ==4 kg. 

 „ VIII. „ S = ± 5.5, w =8 kg. 



= ±60° with different wires. .s> 



Curve II. for r = 0.(32 ; 

 „ IV. „ r = 1.00; 



Fig. 



Fig. 

 Fig. 



Curve II. tor r=0.62; 

 „ IV. for r= 1.00. 



u V. „ r = 0.91, (Swedish iron). 



VI. — Obtained by reversal in M =±19.7 with different wires, r 

 being variable. 

 Curve I. for r = 0.44 ; 

 „ III. „ r=0.77; 



VII. — Obtained by reversal with steel wires, .£ being variable. 

 Curve I. for r= 0.63, r = ±60°'; Curve II. for r=0.91, r = ±60°. 



VIII. — Obtained by reversal with steel wires, r being variable. 

 Curve I. for r=0.63,£ = 19.7 ; Curve II. for r=0.75,£ = 19.7 ; 

 ., III. ,. r=0.91. = 19.7. 



