6 A. A. MERLIN ON RESOLUTION OF AMPHIPLEURA PELLUCID A, ETC. 



defined, and well separated, their beaded nature being quite 

 recognisable, although not so fully revealed as with the oil- 

 immersion. On this specimen the striae alone are just visibly 

 separated by the 12 mm. apochromat, |-ths axial cone, and a 

 Huyghenian eyepiece magnifying about 45 times, the 27 com- 

 pensating ocular not proving sufficiently powerful for the purpose 

 with this objective. 



Journ. Quekett Microscopical Club, Ser. 2 Vol. I'lII., iS'o. 48. April 1901. 



