89 
of Edinburgh, Session 1875 - 76 . 
Flint-Glass in Oil. 
Rio-ht and left contact each continued to diminish the scale 
o 
reading during twenty-two minutes. The change from left to 
right contact diminished the readings with a jump. “ No con- 
tact” again reversed the rotation. 
Flint-Glass in Water. 
No decided effect. 
No contact, 
Right „ 
Left ,, 
Flint-Glass in Air. 
370 scale reading. 
523 
478 
370 
Means. 
N = 370. 
L = 478. 
R = 523. 
The poles of the electro-magnet were now put so far to the east 
of the glass as possible, and again as far to the west. The same 
kind of results were obtained. 
Oil was again used, and no certain effect was observed. March 
31. — The apparatus, as left last day, with 'oil in the jar, showed no 
effect. No effect was shown with air. But on trying a new rod of 
flint-glass the old effects were observed. The oil seemed to have 
destroyed the effect. 
Flint-Glass in Air. 
Right contact, steady rise from 400 to 543 
No contact, 
Left 
Right 
Left 
No 
Right 
No 
Left 
V 
558 
567 
546 
556 
540 
531 
529 
533 
in about 4 minutes. 
R = 538. 
N = 542. 
L = 552. 
No contact, 
Right ,, 
Left „ 
Right „ 
Left ,, 
Half-an-hour interval. 
522 x 
512 
523 
497 
519 
508 ) 
R = 509. 
N - 515. 
L = 521. 
VOL. IX. 
N 
