LIST OF ILLUSTRATIONS. 



[The figures contained in this book are intended to illustrate special 

 features described in the text, and should not be regarded as recom- 

 mendations of any particular instruments or makers ; at the same 

 time, only such firms are mentioned as are actual manufacturers, and 

 whose work is reliable and of the first grade.] 



FIG. PAGE 



A Typical Modern Microscope - - Frontispiece 



1. A Typical Student's Microscope - - 8 



2. Typical Continental Microscope - 12 



3. View of Diagonal Eackwork - - 19 



4. Sectional View of Adjustable Fittings of Back and Pinion - 19 



5. Section of Limb of Microscope to show System of Fine 



Adjustment - 23 



6. * Imperial ' Microscope by E. and J. Beck - - 25 



7. Spindle Milled Head for giving Two Speeds to Fine Adjust- 



ment,' - 26 



8. A Popular Binocular Microscope - 32 



9. Simple Dissecting Microscope - 35 



10. The Aplanatic Magnifier - 35 



11. Metallurgical Microscope - 37 



12. Holder for Metallurgical Work - 38 



13. Travellers' Microscope - 39 



14. Petrological Microscope - - 41 



15. Stand VI. , by Leitz - - 43 



16. Mechanical Stage showing the ' Sprung ' Fittings with 



Adjusting Screws - - - 46 



17. Abbe's Apertometer - - 63 



18. Correction Collar (Zeiss) - 66 



19. The Abbe Test Plate - - 72 



20. Huyghenian Eyepiece - 77 



21. Holoscopic Eyepiece - - 80 



22. Projection Eyepiece - - 81 



23. Zeiss's Binocular Eyepiece - - 83 



24. Abbe Illuminator (1-20 Optical Part) - - 89 



25. C. Baker's Achromatic Condenser - - 91 



26. Iris Diaphragm as fitted to the Condenser Carrier - - 92 



27. \ 



28 



2g* ^Apertures of Condensers - - 94 



30*. j 



31. Image of Lamp -flame - - 96 



