TABLE OF 



CHAPTER I. 



OPTICAL PRINCIPLES OF THE MICROSCOPE. 



PAGI 



Laws of Refraction : Spherical and Chromatic Aberration, .... 1 

 Construction of Achromatic Objectives, ........ 11 



Immersion Systems, . . . . . . . . . . .16 



Simple Microscope, 

 Compound Microscope, ... 

 Principles of Binocular Vision, . 

 Stereoscopic Binocular Microscopes, 



Nachet's, .... 



Wenham's, 



Stephenson's, 



Tolles' Binocular Eyepiece, 



18 

 ........ 22 



. ...... .25 



27 

 ........ 28 



2Q 

 31 

 ........ 33 



Nachet's Stereo-pseudoscopic Binocular, ....... 33 



Special value of Stereoscopic Binoculars, ....... 35 



CHAPTER II. 



CONSTRUCTION OF THE MICROSCOPE. 



PAGE 



GENERAL PRINCIPLES, . , .40 



SIMPLE MICROSCOPES, . . .43 



Ross's, 43 



Quekett's Dissecting, . . 45 



Siebert & Kraft's Dissecting, . 46 



Laboratory Dissecting, . . 47 

 Beck's Dissecting and Nachet's 



Binocular, . . . .48 

 Field's Dissecting and Mount- 

 ing, 49 



COMPOUND MICROSCOPES, . . 51 



Educational Microscopes, . . 53 



Field's, 53 



Crouch's, 53 



Parkes's, 53 



Students' Microscopes, . . .55 



Baker's 59 



Collins's, 59 



Pillischer's (International), 

 Ross's (Zentmayer), 

 Wale's (New Working), 

 Nachet's, . 

 Browning's (Rotating), 

 Crouch's (Binocular), 



59 

 61 

 61 

 63 

 65 

 65 



Baker's (Erecting ditto), . . 65 



Second Class Microscopes, . . 67 

 Powell and Lealand's, . . 67 

 Beck's (Popular Binocular), . 68 

 Collins's (Harley Binocular), . 70 

 Swift's (Challenge), ... 71 

 Browning's Smaller Stephenson 

 Binocular, . . . .73 



First Class Microscopes, . . .73 

 Ross's (Ross Model), . '. .73 

 Ross's (Jackson-Zentmayer), . 75 

 Powell and Lealand's, . . 77 



Beck's, 77 



Beck's (Improved), ... 80 



Microscopes for Special Purposes . 80 

 Beale's Pocket and Demonstrat- 

 ing, 81 



Baker's Travelling, ... 81 

 Swift's Portable, ... 82 

 Nachet's Chemical, ... 82 



Non-Stereoscopic Binoculars, . . 84 

 Powell and Lealand's, . . 85 

 Wenham's, . . . .85 



