430 MR. J. E. H. GORDON ON MEASUREMENTS OE ELECTRICAL CONSTANTS. 
Another piece of the same. 
6=1-003. 
a 2 
CO 
1-739 
1-044 
1-737 
1-043 
1-730 
1-042 
a .,—a 
•695 -694 
Mean -6923. 
K = 3-228. 
•688 
Ebonite. 
Four slabs of different thickness. 
No. 1. 
6=-754 (mean). 
cu 
a.-, —a 
(1) 
1-460 
( 3 ) 
1-453 (5) 
1-453 
(?) 
(2) 
1-031 
( 4 ) 
1-032 (6) 
1-036 
(«) 
•429 
•421 
•417 
Mean -42175. 
K=2-2697. 
No. 2. 
b = 
•509 (mean). 
a. 2 
(2) 
1-313 
(4) 1-318 
(6) 
1-315 
(1) 
1-032 
(3) 1-033 
( 5 ) 
1-033 
rto- 
-<h 
•281 
•285 
•282 
Mean '2826. 
K=2-2482. 
No. 3 * 
b=- 516. 
d 2 
(1) 
1-325 
(3) 1-323 
( 5 ) 
1-321 
a l 
(2) 
1-030 
(4) 1-030 
1-031 
a 2 - 
-<h 
•295 
-293 
•290 
•420 
Mean -2926. 
K=2-3097. 
* Slabs Nos. 3 and 4 were much warmer than Nos. 1 and 2 when experimented on. But on the experi¬ 
ment with No. 4 being repeated after it was cool no difference was perceptible. 
