Ch. VI] 



DRAWINGS FOR PUBLICATION 



189 



of manuscript and drawings for publication in the scientific journals 

 published by the Institute. The hints to contributors given on 

 the second page of the cover in all the journals give in a nutshell the 



Substage 

 Condenser 



Fig. 115. Diagrams to Show the Position of the Substage Condenser 

 when no Parallelizing Lens is Used. 



(From Optic Projection.) 



A The substage condenser is within the focus (/) at a point where the long 

 light cone is of about the same diameter as the substage condenser. 



B The substage condenser is beyond the focus (/) of the long focus main con- 

 denser at a point where the diverging cone is of about the same diameter as the 

 substage condenser. This is the better position for the substage condenser of the 

 ordinary microscope. 



Arc Supply The right-angled carbons of the arc lamp. 



L\ L% The first and the second elements of the main condenser. 



Water Cell. This is to remove the radiant heat. 



Axis The principal axis on which all the parts are centered. 



/ The principal focus of the second element of the main condenser. In both 

 cases the focus is long. 



Substage Condenser This is the first or lowest element of the substage con- 

 denser. It is of the achromatic type. 



main points. These journals are: The American Journal of Anat- 

 omy; The Anatomical Record; The Journal of Morphology; The 

 Journal of Comparative Neurology, and the Journal of Experimental 

 Zoology. 



