5 



viii LIST OF ILLUSTRATIONS 



ENGRAVINGS IN THE TEXT 



1. SIMPLE POCKET MAGNIFIER - - - - 4 



2. APLANATIC MAGNIFIER, SHOWING ARRANGEMENT OF 



LENSES . - - - - 



3. Watson's " laboratory " dissecting microscope - 8 



4. cheaper form of dissecting microscope - - 9 



5. Watson's " praxis " mioeoscopb - - - 15 



6. Watson's " naturalist's " microscope - - 19 



7. Williams' "wonder" microscope - - - 20 



8. beck's " STAR " microscope - - ■ - 21 



9. watson's " fram " microscope ■ - - 23 



10. swift's "portable clinical and field" microscope 24 



11. bttll's-eye condenser - - - -34 



12. SILVER side reflector - - - -35 



13. abbe condenser mounted for tjnder-stage - 38 



14. polarizer - - - - - - 41 



15. analyzer - - - - - - 41 



16. live cage - - - - - - 44 



17. stage forceps - - - - - - 44 



18. net for collection of pond-life - - - 53 



19. a few cells prom the leaf of the american water- 



WEED - - - - - - 56 



20. female water-flea - - - - - 59 



21. amceba proteus - - - - - 60 



22. common rotifer - - - - - 62 



23. turntable - - - - - - 68 



24. balsam-bottle, with dipping-rod - - - 71 



25. microtome for botanical sections - - - 76 



