lucida, place paper upon the table or board, view 

 through camera lucida for correct position and fasten 

 with drawing tacks ; modify light so that image and 

 pencil point are equally distinct. 



Use of the Abbe Camera Lucida. Care must 

 be observed in attaching this to the 'microscope tube. 

 The opening in the silvered surface of the glass cube 

 must be so placed that it will be coincident with the 

 focal point and axis of the eyepiece. If too high or 

 low the field will be reduced or one side of the field 

 will be cut off. 



Focus upon object ; attach camera lucida and adjust 

 so that field is round and not cut off. 



Place drawing board with paper attached at right 

 hand side of microscope ; look into camera lucida and 

 adjust reflecting mirror ; place paper in proper position 

 and tilt board to proper inclination ; place pencil upon 

 the paper and regulate light from both fields until image 

 and pencil are equally distinct. 



To Measure the Amount of Enlargement. 



This is accomplished by means of a stage micrometer 

 (which as has already been stated consists of a very 

 fine scale which is ruled upon the glass slide) after the 

 drawing is made. 



Remove the object and replace with stage micrometer. 

 Place so that one of the lines coincides with the outline 



