By Julia Bell 
339 
a =100 subtense/chord, on the assumption that the curve is symmetrical about the subtense 
from callipers and tape measurements of the nasal bridge to the ratio of "rise" to "span." 
Values of a for given values of (3 as argument. 
0 
•o 
■/ 
•2 
•3 
■-4 
•5 
•6 
'7 
'9 
65 
59-5 
59-5 
59-6 
59-6 
59-7 
59-8 
59-8 
59-9 
59-9 
60-0 
66 
60-1 
60-1 
60-2 
60-2 
60-3 
60-4 
60-4 
60*5 
60-5 
60-6 
67 
60-7 
60-7 
60-8 
60-8 
60-9 
61-0 
61-0 
61-1 
61-1 
61-2 
68 
61-3 
61-3 
61-4 
61-4 
61-5 
61-6 
61-6 
61-7 
(11-7 
61 -8 
69 
61-9 
61-9 
02-0 
62-0 
62-1 
62-1 
62-2 
62-3 
62-3 
62-4 
70 
6-2-4 
62-5 
62-6 
62-6 
62-7 
62-7 
62-8 
62-9 
62-9 
63-0 
71 
63-0 
63-1 
63-1 
63-2 
63-3 
63-3 
63-4 
63-4 
63-5 
63-6 
72 
63-6 
63-7 
63-7 
63-8 
63-9 
63-9 
64-0 
64-0 
64-1 
64-1 
73 
64-2 
64-3 
64-3 
64-4 
64-4 
64-5 
64-6 
64-6 
64-7 
64-7 
74 
64-8 
(!4-9 
64-9 
65-0 
65-0 
65-1 
65-1 
65-2 
65-3 
65-3 
75 
65-4 
65-4 
65'5 
65-6 
65-6 
65-7 
65-7 
65-8 
65-8 
65-9 
76 
66-0 
66-0 
6(5-1 
66-2 
66-2 
66-3 
■66-3 
66-4 
60 -4 
66-5 
77 
66-5 
66-6 
66-7 
66-7 
66-8 
66-8 
66-9 
66-9 
67-0 
67-1 
78 
67-1 
67-2 
67-2 
67 3 
67-4 
67-4 
67-5 
67 "5 
67-6 
67-6 
79 
67-7 
67-8 
67-8 
67-9 
67-9 
68-0 
68-0 
681 
68-2 
68-2 
80 
68-3 
68-3 
68-4 
68-5 
68-5 
68-6 
68-6 
68-7 
68-7 
68-8 
81 
68-9 
68-9 
69-0 
69-0 
69-1 
69-1 
69-2 
69-3 
69-3 
69-4 
82 
69-4 
(59-5 
69-5 
69-6 
69-7 
69-7 
69-8 
69-8 
69-9 
70-0 
83 
70-0 
70-1 
70-1 
70-2 
70-2 
70-3 
70-4 
70-4 
70-5 
70-5 
84 
70-6 
70-6 
70-7 
70-8 
70-8 
70-9 
70-9 
71-0 
7T0 
71-1 
85 
71-2 
71-2 
71-3 
71-3 
71-4 
71-4 
71-5 
71-6 
71-6 
71-7 
86 
71-7 
71-8 
71-8 
71-9 
72-0 
72-0 
72-1 
72-1 
72-2 
72-2 
87 
72-3 
72-4 
72-4 
72-5 
72-5 
72-6 
72-6 
72-7 
72-8 
72-8 
88 
729 
72-9 
73 0 
73-0 
73-1 
73-2 
73-2 
73 3 
73 3 
73-4 
89 
73-4 
73-5 
73-6 
73-6 
73-7 
73-7 
73-8 
73-8 
73-9 
73-9 
90 
74-0 
74-1 
74-1 
74-2 
74-2 
74-3 
74-3 
74-4 
74-5 
74-5 
91 
74-6 
74-6 
74-7 
74-7 
74-8 
74-9 
74-9 
75-0 
75-0 
75-1 
92 
75-1 
75-2 
75-3 
75-3 
75-4 
75-4 
75-5 
75 - 5 
75 - 6 
75-6 
93 
75-7 
75-8 
75-8 
75-9 
75-9 
76-0 
76-0 
76-1 
76-2 
76-2 
94 
76-3 
70 3 
76-4 
76-4 
76-5 
76-6 
76-6 
76-7 
76-7 
76-8 
95 
76-8 
76-9 
76-9 
77-0 
77-1 
77-1 
77-2 
77-2 
77-3 
77-3 
96 
77-4 
77-5 
77-5 
77-6 
77-6 
77 "7 
77 - 7 
77-8 
77-8 
77-9 
97 
78-0 
78-0 
78-1 
78-1 
78-2 
78-2 
78-3 
78-3 
78-4 
78-5 
98 
78-5 
78-6 
78-6 
78-7 
78-7 
78-8 
78-9 
78-9 
79-0 
79-0 
99 
79-1 
79-1 
79-2 
79-2 
79-3 
79-4 
79-4 
79-5 
79-5 
79-6 
100 
79-6 
79-7 
79-8 
79-8 
79-9 
79-9 
80-0 
80-0 
80-1 
80-1 
O A .O 
oU 2 
OA »0 
oU O 
QA .*3 
OU O 
80'4 
Q A . 1 
oU 4 
80 '5 
oU 0 
on .n 
oU b 
QA 
OV i 
102 
80-8 
80-8 
80-9 
80-9 
81-0 
81-0 
81-1 
81-1 
81-2 
81-3 
103 
81-3 
81-4 
81-4 
81-5 
81-5 
81-6 
81-6 
81-7 
81-8 
81-8 
104 
81-9 
81-9 
82-0 
82-0 
82-1 
82-1 
82-2 
82-3 
82-3 
82-4 
105 
82-4 
82-5 
82-5 
82-6 
82-6 
82-7 
82'8 
82-8 
82-9 
82-9 
106 
83-0 
83-0 
83-1 
83-1 
83 2 
83 3 
83-3 
83-4 
83'4 
83-5 
107 
83-5 
83-6 
83-6 
83-7 
83-8 
83-8 
83-9 
83-9 
84-0 
84-0 
108 
84-1 
84-1 
84-2 
84-3 
84-3 
84-4 
S4-4 
84-5 
84-5 
84-6 
109 
84-6 
84-7 
84-8 
84-8 
84-9 
84-9 
85-0 
85-0 
85-1 
85-1 
110 
85-2. 
85-3 
85-3 
85-4 
85-4 
85-5 
85-5 
85-6 
85-6 
85-7 
111 
85-8 
8,5-8 
85-9 
85-9 
86-0 
86-0 
86-1 
86-1 
86-2 
86-2 
112 
86-3 
86-4 
86-4 
86-5 
86-5 
86-6 
86-6 
86-7 
86-7 
86-8 
113 
86-9 
86-9 
87-0 
87-0 
87-1 
87-1 
87-2 
87-2 
87-3 
87-4 
114 
87-4 
87-5 
87-5 
87-6 
87-6 
87-7 
87-7 
87-8 
87-8 
87-9 
115 
88-0 
88-0 
88-1 
88-1 
88-2 
88-2 
88-3 
88-3 
88-4 
88-5 
116 
88-5 
88-6 
88-6 
88-7 
88-7 
88-8 
88-8 
88-9 
88-9 
89-0 
43—2 
