PLATES. 



FRONTISPIECE. 



FOOT OF SPIDER, X 150. 



Color of object Brown-yellow. Objective 16 mm. apochromatic. 



Screen used Pale yellow. Ocular Projection No. 3. 



Condenser Lower part of achro. 



by Swift. 

 Light Lime. 



Plate Landscape gel. brom. 

 Exposure 5 minutes. 

 Development Pyro ammonia. 



PLATE I. 

 1. 



HAIRS ON PROBOSCIS OF BLOWFLY. Critical image, X 375. 

 Color of image Brown. Objective 6 mm. apochromatic, 



Screen None. N. A. 95, Zeiss. 



Ocular Projection No. 3. 



Condenser Achromatic 140 deg. 



Light Lime. 



Plate Lantern-slide gel. brom. 



Exposure 2 minutes. 



Development Pyro ammonia. 



2. 



INJECTED VILLI, INTESTINE OF RABBIT, X 30. Preparation by E. C. Bous- 



field, L.R.C.P. 



Color Very dense orange-yellow. Objective Swift 1 inch. 

 Screen None. Ocular None. 



Condenser Lower part of achro* 

 with author's ground glass 

 (see p. 71). 



Plate Eosin. Light-Lime. 

 Exposure 14 minutes. 

 Development Pyro ammonia. 



