| It is held in a spring-sleeve and the substage can be raised and lowered by lateral screw, or may be swung to one side. |
| The substage condenser must have a continuously variable circular aperture diaphragm and be capable of true Kohler illumination for the full spectral range of 350 to 950 nm. |
| Remove the substage condenser and replace it by the dark ground condenser. |
| Once she turned the substage mirror a bit to catch direct the light streaming in the window. |
| Rick set up his microscope on the kitchen table and plugged in the substage illumination. |
| Adjust the substage mirror so that the light is reflected upward. |
