40 LoBB^ on Illuminating Objects with High Poivers. 
phragms without any stop^, the ^th, -Vth, Tt^^, VT^h, or -jTjth. 
object-glasses^ and the or C eye-piece as may be 
thought proper; now bring the object into focus, and by 
merely racking the condeuBer for the best light, very clear 
and satisfactory definition will be obtained. Nothing more 
