A12 Scientific Intelligence. | 
net was rendered active ; but whatever gas was employed, or whatever 
d 
magnetic or diamagnetic, in relation to air. Oxygen passes inwards or 
tends toward the magnetic axis, confirming the results formerly de- 
scribed by the author in his account of his investigations of flame and 
ases 
Perceiving that if two like bubbles were set on opposite sides of a 
magnetic core or keeper cut into the shape of an hour-glass, they would I 
compensate each other, both for their own diamagnetic matter and for a) 
the air which they would displace ; and that only the contents of the 
bulbs would be virtually in a differential relation to each other, the au- 
thor passed from bubbles of soapy water to others of glass ; and then 
constructed a differential torsion balance to which these could be at- 7 
A ie hr cee 
cocoon silk, and at right angles, at the end of one arm, was attached a 
horizontal cross-bar, at which, about 14 inch apart, and equidistant from 
the horizontal lever, were suspended the glass bubbles; and then the 
whole being 
of the latter point. For this purpose he prepared glass bu 
taining a full atmosphere, or half am atmosphere, or any other propor- 
‘tion of a given gas; having thus the power of diluting it without the 
addition of any other body. The effect was most striking. Wh 
rogen and oxygen bubbles were put into the balance, ea 
phere, the oxygen drove the nitrogen out powerfully. 
