NEGATIVE MAKING 



97 



In Fig. 25 a female mosquito, Anopheles, 

 is shown. The lens was the same as the last, 

 with stop //32. Exposure, 4 seconds; plate, 

 rapid landscape; no screen; developer, eiko- 

 hydro; amplification, 3 diameters. 



Fig. 26. Human scalp flat section, cut- 

 ting hairs transversely. Lens, Ross' con- 

 centric 4 inches focus; stop, //22; plate, 

 Forbes' orthochromatic S; screen, picric acid; 

 exposure, 2 minutes; developer, eiko-hydro; 

 amplification, 7 diameters. 



