PART I. 

 flfetorg of % $n&*ntton antt Improvements; of tje 4!Huro$cope. 



CHAPTER I. 



PAGE 



History of the Microscope . . . . . .1 



CHAPTER II. 



Mechanical and Optical Principles involved in the Construction of the 

 Microscope Lenses Mode of Estimating their Power, <fcc. Achro- 

 matic Lenses Magnifying Power Wollaston's Doublet Codding- 

 ton's Lens Ross's Simple and Compound Microscopes Baker's 

 Microscopes Micrometers, &c. . . . . .12 



CHAPTER III. 



Preliminary Directions Illumination Accessory Apparatus Achro- 

 matic Illuminator Gillett's Condenser Preparing and Mounting 

 Objects Injecting Chemical re-agents Collecting Objects The 

 Camera Lucida Polarised Light Binocular Instrument Photo- 

 graphic Drawing . . . . . . .53 



PART II. 



CHAPTER I. 



Protozoa Rhizopoda History of Infusorial Animalcules Monads 

 Diatomaceae, Fossil Infusoria, Vorticellid8e,Stentors, Rotifera, Flos- 

 cularidae, Xanthidia Sponges . . . . 129 



