66 ELEMENTARY PHOTO-MICROGRAPHY. 



LIST OF PLATES. 



FACING 



I. WHOLE INSECTS TAKEN WITHOUT A MICROSCOPE. 



Fig. 12. Fantail Fly }- 16 



Fig. 13. Pearl Fly ... 



II. TAKEN BY DIRECT LIGHT. 



Fig. 14. Section of human tongue [ 24 



Fig. 15. Section of clematis stem 



III. TAKEN BY REFLECTED LIGHT. 



Fig. 16. Coralline J. 32 



Fig. 17. Diatoms 



Fig. 19. Brucine, with polarised light 



IV. Fig. 18. Diatoms, with dark ground illumination ... ... \ 



V. DIATOMS. 



40 



Fig. 20. Pleurosigma angulatum \ 



Fig. 21. Diatom showing markings, with oblique I 4 g 



VI. BACTERIA. \ 



Fig. 22. Bacillus subtilis j. 57 



Fig. 23. Micrococcus tetragonus ) 



