526 Proceedings of Royal Society of Edinburgh. [sess. 
breadth of the one beside D 2 , I judged that m must in this case 
have been not very different from *0002 ; and I calculated accord- 
Fig. 2. ra=001 
D P ] 
Id, 
I. o 
1 u 
|V 
9 
96 
9 
97 
9 
98 
A 
t/m/ 
'tote, 
)0 1 
V 
\Asy 
mptc 
Te 
I00\0 
y i 
001 
1 
662 
i 
003 
0&T 
A 
\l 
li 
m 
' 
ingly from (6) the accompanying graphical representation showing 
the value of 1 — represented by y in fig. 1. Tig. 2 represents 
