Oct 19,1888.] 



SCIENTIFIC NEWS. 



403 



The fine adjustment to the microscope is connected by I pulley, fixed at the end of the rod which extends to the 

 -ans of a fine cord to a small pulley keyed to a pinion, | back of the camera. 



means 



Fig. 4. 



carried on a bracket secured to the revolving table, upon 

 which the lantern and microscope are fixed. At the 



This method will allow the lantern and microscope 

 to be turned to one side without disconnecting the cord, 



Fig. 5. 



end of this pinion is a grooved pulley, which, on the 

 microscope, etc., being brought into the central position 

 in front of the camera, gears with a small rubber-tyred 



a matter sometimes forgotlen when the fine adjustment 

 screw is worked direct from the pulley on the rod, to the 

 great detriment of a delicately constructed instrument. 



