1904-5.] Mr T. Oliver on Diameters of Twisted Threads. 497 
(D 
(2) 
(3) 
From 
experiments. 
From 
graphs 
of 
fig. 8. 
From 
experiments. 
From 
graphs 
of 
fig. 8. 
From 
experiments. 
From 
graphs 
of 
fig. 8. 
Maximum . 
Minimum . 
^ = 1-30 
177 
3*18 
= 1*50 
2-12 
2 -^ 6 = l-41 
1-82 
Maximum . 
230 , 
1*48 
1*58(7 
— = 1-69(7 
1-88 
171 d 
^ = 1-69(7 
1-52 
1-66(7 
Minimum , 
1 ’77 
t-LL = l-20 d 
1-48 
1*21 d 
2 -^| = l-13(7 
1-88 
1-14(7 
— = 1'20(7 
1-52 
1-17(7 
Average diameter 
of single . 
1"48 divisions 
1-88 divisions 
l - 52 divisions 
The author is indebted to the Carnegie Trust for the Universi- 
ties of Scotland for a grant to meet the expenses of this research. 
{Issued separately April 8, 1905.) 
PROC. ROY. SOC. EDIN. — VOL. XXV. 
32 
