LIST OF PLATES IX 



PLATE TO FOLLOW PAGE 



Q ( A. Proboscis of Blowfly X 105 ) 



9 ' IB. X220J 



10. Quartz Felsite under Polarised light X 10 (Colour plate) . 96 



11. Embryo Chick x 15 ....... 112 



12. ' Some faults commonly met with . . . . 120 



13. Dog Flea x 40 ..... . . .128 



, A /A. Window Gnat x 7 \ 

 \ B. Louse of Cat x 70 } 



15. Longitudinal section of Mouse x 6 J . . . .136 



16 /A. Section of Pitchstone x 60 ) 



I B. Section of Lepidodendron selaginoides X 13 J 



17. Control of contrast and definition by Colour Screens . .152 



, o (A. Hoof of Horse x 6 ..... \ , eo 



' I B. Section of Human Scalp x 45 (Colour plate) J 



19. The same to illustrate the use of Colour Screens . .160 



20. Fairy Fly X 25 ........ 162 



21. Comparison of Ordinary and Colour Sensitive Plates . 168 



22. Group of Diatoms x 56 (Colour plate) . . . .176 



23 {A. Fairy Fly X 50 176 



\ B. Group of Sponge Spicules x 50 ) 



04 ( A. Lophopus crystallinus x 20 \ 

 \ B. Group of Polycistina X 45 ) 



9r - (A. Crystals of Cinchonidine X 45 \ 

 \ B. Quartz diorite x 20 . 1 1 



2fi ( A. Hind-leg of Bee x 16 \ 

 \B. Leaping Spider x 12 / 



27. Stereoscopic photomicrograph of Insect Eggs . . .192 

 28 (A. Spiegeleisen x 45 \ 



IB. xsooj 



2q (A. Mild Steel x 50 \ 

 29 ' \B. Monel Metal x 150} 



30. Section of Head of Mouse x 8 (Colour plate) . . .208 



01 (A. Section of Cancer x 100 ) 

 ( B. X 700 J ' 



00yl 

 224 



A. Section of the same Cancer after Radium treatment x 100 \ 



B. X700I 



'A. Bacillus anthracis with Spores x 1200^ 

 B. typhosus x 12W\ 



33. -{C. Klebs-Loffler bacillus x 1200 . . .240 



D. Spirochceta plicatilis x 600 

 .E. Micrococcus in Pus x 1500 



