XXVI 



LIST OF WOODCUTS. 



PAGE 



Hamilton Smith's " Universal Apertometer " (10 figs.) .. .. No. 6 775-9 



Woodward's Apertometer „ 782 



Diagram illustrating Professor Abbe's Paper on Methods for Im- 

 proving Spherical Correction No. 7 817 



JEucampia striata (4 figs.) 835 



Mayall's Immersion Stage Illimiinator 



Rogers' Comparator for Measures of Length 



Rezner's Mechanical Finger (4 figs.) 



Zeiss' Travelling Microscope 



Schobl's Dissecting Microscope 



837 

 948 

 951-3 

 955 

 956 



