VJ11 LIST OF ILLUSTRATIONS. 



Page 288. A variation of Cheshire's Apertometer. 

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298. The measurement of the initial magnifying power : diagram 



to show relative position of apparatus. 

 32Q. Structure of pores in P. balticum according to O. Miiller. 

 365. Diagram showing method of illumination. 



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3C8. Centring stop-holder. 



374. Diagram of eye and Ram~den disc. 



383. Exhibition of plasmodia. 



517. Diagram illustrating a " new " object-glass. 



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567. An addition to the objective : diagram. 

 504. Various insect structures. 



