8 PLATES. 



PLATE II. 



l. 

 A. MARGARITACEUS, X 150. General appearance. 



Objective 16mm. apo. atN.A. '30. 

 Ocular Projection No. 3. 

 Condenser Lower part of achro. 

 Light Lime. 



Plate Thickly coated landscape. 

 Exposure 40 seconds. 

 Development Pyro ammonia. 



2. 

 TRICERATIUM, Critical image of secondary structure, X 750. 



Objective 3 mm. apo. at N.A. 1. 

 Ocular Projection No. 3. 

 Condenser Powell and Lealand 



used dry. 

 Light Lime. 



Plate Thickly coated landscape. 

 Exposure 45 seconds. 

 Development Pyro ammonia. 



PLATE III. 



+ 



1. 



4 TASTE-BUDS "IN TONGUE. X 100. Preparation by E. Klein, M.D., F.R.S. 

 Stain Logwood. Objective 24 mm. apo. Zeiss. 



Screen Pale yellow. Ocular Projection No. 3. 



Condenser Achro. lower part, 



with author's ground glass. 

 Light Lime. 

 Plate Eosin. 

 Exposure 15 seconds. 

 Development Pyro ammonia. 

 2. 



TYPHOID BACILLI IN INTESTINE. X 750. Preparation from the Research 



Laboratory, Royal College of Physicians, Edinburgh. 

 Stain Gentian violet. Objective 3 mm. apo. at about 



Screen Medium yellow. N.A.I. 



Ocular Projection No. 3. 



Condenser Zeiss. Apo. N.A. 1. 



Light Lime. 



Plate Eosin. 



Exposure 90 seconds. 



Development Quinol-caustic. 



