224 W. Crookes— Lines of Molecular Pressure. 
twisted half off the indicator, which immediately rotated with 
great speed. 
The Trajectory of Moiecules—The amount of deflection of the 
stream of molecules forming a shadow is in proportion to the 
magnetic power employed. 
The trajectory of the molecules forming the shadow is 
curved when under the magnetic influence; the action of the 
magnet is to twist the trajectory of the molecules round in a 
direction at an angle to the free path, and toa greater extent 
as they are nearer the magnet, the direction of .twist being that 
rresponds to # 
higher velocity. This may arise from one of two conditions: 
either the initial impulse given by the negative pole is strong 
