Subject ASC0000dnc
The Intellectual observer.
v.8 (1866), Page 467 (1866)
Harvard University, MCZ, Ernst Mayr Library
BHL Page 39469967
Keywords
Opaque illuminators Apparatus Instrument Light reflection Messrs. Powell and Lealand illuminator reflector external appearance instrument object diaphragm sectional view cross section light telescope opaque Diagrams technical images of mechanical devies "opaque illuminators for high powers" technical image for mechanical device "opaque illuminators for high powers" illuminators microscope appearance magnify apparatus glass Opaque Illuminators for High Powers Microscopes H. L. Smith Silliman's Journal Microscope