Minnaert recommends practicing first with a polarizer, then trying it without.
He was the first to observe the slight polarization dependence of the human eye, observed via the phenomenon now known as Haidinger's brush.
Eisentraut's brush-furred rat | Dieterlen's brush-furred mouse | Basil Brush | Brush Traction | Brush Prairie, Washington | Brush | The Fuller Brush Man | The Fuller Brush Girl | George Jarvis Brush | Charles F. Brush High School | Charles F. Brush | Brush Shiels | Brush Electrical Machines | Brush (electric) | Brush Development Company | Brush Creek Township | brush | Wilhelm Karl Ritter von Haidinger | scrub brush | Ohio Brush Creek | Haidinger's brush | Fuller Brush Company | Deena Brush Mapple | Brush Strokes | Brush Mountain | Brush Creek Township, Faribault County, Minnesota | Alexander Brush |
The species was first identified as L. ansorgei in Mumias, Nyanza Province in 1896.