626 
Proceedings of the Boyal Society 
11 Hooper ” Company. The following are the most important results 
of the experiments : — 
Gutta-Percha, No. I. 
= *99 mm.; mean free temperature, 40° C. 
Junefc. 
yl 1 
yA 
y-2 1 
y 3 
2/4 
y 5 
2/6 
y 7 
A x 
b, 
a 
I. 
0*0 
4-8 
11*2 
18*6 
24*4 
20-3 
12*9 
5*6 
-11-13 
1 
p 
00 
02 
11*17 
II. 
1*7 
1-8 
oo 
o 
13*4 
18*9 
18*7 
11*7 
6*7 
- 8*46 
- 2-72 
8*89 
175° 34' 
162° 10' 
log e =0*22835; /3-/3'*=13 0 24j| 0*2345 radians ; 
K 
cp 
= 0*0479 mm. secs. 
Gutta-Percha, No. II. 
t = 2*04 mm.; mean free temperature, 46° C. 
Junctions. 
y 0 
y i 
2/2 
2/3 
2/4 
2/5 
2/6 
2/7 
A, 
a 
I. 
2*0 
6*9 
12*7 
18-0 
17*2 
11*9 
6-7 
1*7 
-7-59 
3*48 
8-35 
11. 
0*0 
1*6 
5*9 
11*1 
13-0 
9*8 
5*6 
1*6 
-6*37 
0*31 
6*38 
24°45' 
2°47' 
log ft. = 0-26915; /3 - <3' = 21° 58' = 0-38397 radians; 
6 a 
— = 0*0494 mm. secs. 
cp 
The third junctions in the gutta-percha did not give reliable 
results, owing to the very slight temperature variations. 
India-Kubber, No. I. 
t — 3-320; mean free temperature, 23° C. 
P 
42° 10' 
8° 16' 
log % = 0*27687; (3 - (3' = 33° 54'= 0-5923 radians; 
e a 
— = 0-176. 
cp 
Junctions. 
2/o 
2/i 
y^ 
2/3 
2/4 
2/s 
2/6 
2/7 
A, 
a 
I. 
2*1 
5*4 
9-2 
11-9 
9*7 
6*1 
2*1 
0*3 
-4-08 
3-69 
5*50 
II. 
0*1 
1*6 
4*9 
7*8 
8-4 
6*6 
3*7 
1*1 
-4*13 
0-60 
4*17 
* These values of >8-/3' include -0006 radians, being the equivalent for the 
7-6" lost in reading. 
