To Attach Objective. Using a low power 

 objective, remove from its box and see that its front 

 lens is clean ; elevate the tube of the stand by means 

 of the coarse adjustment so that the nose-piece shall be 

 at least fwo inches from the stage. 



Proper manner of holding objective when attaching it to tube. 



Grasp the upper knurled edge of objective between 

 thumb and forefinger of the left hand ; bring the screw 

 in contact with the screw of the nose-piece and, keeping 

 the objective in line with the tube and gently pressing 

 upward, revolve the objective with the thumb and fore- 

 finger of the right hand by the lower milled edge until 

 shoulder sets against shoulder. 



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