PROFESSOR TAIT ON KNOTS. 
16 
2 
Yes 4 = 4 5 =,% 
See 3 | | eo 
l/ 3 3 3 pes! 
Vv VI. VII 
o) 2 —— 9 
VAS |: | 
c= 6 56s 
Vibe De 
6 —== 
MN 7—=7 
en Zp = 
X. XU 
The relations of equivalence in pairs among six of these forms, which were 
pointed out in § 11 and in Plate XV. figs. 5, 6, 7, are even more clearly seen 
as below :— 
nN SN 
3—4—3 = 3—4—3 
ay, NNT 
2 2 2 
II. IV. 
2 
SA f xX 
LENE = is Scere 
2 le 
3 
III. Ni 
2—2 hy aa 
ap pe | 
ne ald = Lacan 
A, ee 
Vi VII. 
where the mode of passing from one form to the equivalent one is obvious. 
