The collected mathematical papers of Arthur Cayley, Sc.D., F.R.S., sadlerian professor of pure mathematics in the University of Cambridge: The collected mathematical papers of Arthur Cayley, Sc.D., F.R.S., sadlerian professor of pure mathematics in the University of Cambridge

cayley, arthur; forsyth, andrew russell

384 
A MEMOIR ON CUBIC SURFACES. 
[412 
48. The diagram is 
Lines. 
11 = 12 -<7, 
12 
13 
14 
15 
16 
23 
24 
25 
CC 
S 26 
5 
S 34 
35 
36 
45 
46 
56 
12.34.56 
12.35.46 
12.36.45 
13.24.56 
13.25.46 
13.26.45 
14.23.56 
14.25.36 
14.26.35 
15.23.46 
15.24.36 
15.26.34 
16.23.45 
16.24.35 
16 .25.34 
15x2 = 30 
15x1 = 15 
30 
45 
Pj o 
►T** h- 
Biradial planes, through 
each pair of rays. 
Planes each containing 
three mere lines. 
fed 
S-P* 
5’ f