OBJECTIVES AND OCULARS. 
67 
scopics ” were also of good performance, and properly 
designated; those we examined were marked as magni¬ 
fying live and ten times. 
Two condensers examined at the same time were 
found very good ; one had, when complete, N. A. about 
•95, the other was intended for use as an oil immersion, 
but also acted well dry ; this condenser could also be 
used without its top combination for medium apertures 
quite successfully. The prices of these condensers also 
ought to recommend them to many (see Appendix). 
