8o 



ELEMENTARY PHOTO-MICROGRAPHY. 



Name of Filter. 

 B and E 

 G and H 

 B and C 

 D and H 



Visual Colour. 

 Yellow-green 

 Pure green 

 Blue-green 

 Violet 



As a general guide, the following list of the 

 chief microscopic stains with the filters to be used 

 may be of advantage : 



Stain. 



Aniline blue . 

 Bismark brown 

 Congo red . . 

 Eosine 



Erythrosine . . 

 Fuchsine 

 Gentian violet 

 Haematoxylin 

 Iodine green 

 Methylene blue 

 Methyl violet 

 Methyl green 

 Picro carmine 

 Rose Bengal . 



Screen to be used. 



. . B and E 



.. C 



. . B and C 



. . G and H 



. . G and H 



. . B and G 



. . B and E 



. . B and C 



.. F 



. . D and G 



. . B and E 



.. F 



. . G and H 

 G and H 



For insects and yellow sections generally, 

 photograph as follows : 



FOR CONTRAST, with a C screen. 



FOR DETAIL in the section, with an F screen. 



