Researches on diamagnetism and magne-crystallic action : including the question of diamagnetic polarity (1870)
Tyndall, John, 1820-1893 · London : Longmans, Green · leaf 275
otions; the first up and downthe two pillars C C, parallel to itself; the second being a motionround its own axis. To this cross piece is attached the mag-nifying apparatus A. The bar to be examined is set upright between the twopillars ; being fixed firmly into a leaded screw imbedded in… … RELATING TO MAGNETISM AND ELECTRICITY. 241 accurately into a brass collar, moving up and down in it withthe least possible friction. The other point of the rod pressesagainst a plate of agate very close to a pivot round which theplate can turn. The agate plate is attached to a brass lever2*1 inches…
