ELEMENTARY PHOTO-MICROGRAPHY. 



3iN. OBJECTIVE. 



Transmitted 

 Light. 



Dark 

 Ground. 



Reflected 

 Light. 



Section of Human Tongue. Red. "A" eyepiece. 

 No condenser. Chromatic plate. One minute. 



Leg of Fly. Brown. Groand-glass interposed 

 between lamp and object to secure sharpness of 

 hairs and reduce the white diffraction effects. 

 " A " eyepiece. Slow plate. Four minutes. 



Polycystincv. Slow plate. Webster condenser. 



"A" eyepiece. Four minutes. 

 White Coralline. No eyepiece. Slpw plate. Side 



reflector. Five minutes. 



SIN. OBJECTIVE. 



Transmitted 

 Light. 



Reflected 

 Light. 



Dark 



Ground. 



Polariscope. 



Beetle's Eye. Section. Slow plate. Three minutes. 

 " A " eyepiece. No condenser. 



Diatoms mounted as opaque objects. Slow plate. 

 Four minutes. " A " eyepiece. 



Polycvstina. Webster condenser. Slow plate. 

 Four minutes. 



Brucine. Eyepiece removed. Chromatic plate. 

 Eight minutes. 



Transmitted 

 Light. 



Reflected 

 Light. 



Dark 



Ground. 



Polariscope. 



UN. OBJECTIVE. 



Diatoms. "A" eyepiece. Slow plate. Four 



minutes. 

 Wing of Fly. Slow plate. One minute. 



Foraminifera. "A" eyepiece. Rapid plate. Ten 

 minutes. 



Diatoms. Slow plate. " A " eyepiece. Sixteen 



minutes. 

 Ditto. Ditto. No eyepiece. Ten minutes. 



Aspiirtic Acid No eyepiece. Chromatic plate. 

 Eighteen minutes. 



JIN. OBJECTIVE. 



Transmitted 

 Light. 



Section of Deal. " A " eyepiece. Rapid plate. 

 Ten minutes. 



