I 10 
MR. A. B. KEMPE ON THE THEORY OF MATHEMATICAL FORM. 
39 
Fig. 42. 
b c d e f g h 
b a hgfedc 
c d e f g h a b 
d c bah g f e 
e f g h a b c d 
f e d c b a h g 
g h d b c d e f 
h g f e d c b a. 
T 3 =a b c d e f g h 
b c d e f g h a 
c d e f g h a b 
d e f g h a b c 
e f g h a b c d 
fghabcde 
g h a b c d e f 
h a b c d e f g. 
(S) 4 = 
•o 
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Fig. 46. 
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