Note 69 — Chapter III · Investigation of Microscopic and Optical Characters of Minerals.
Reading edition
In the Seibert microscope use No. V objective, in Fuess microscope No. 7 objective, and in English microscopes a ¼″ or ⅕″ objective.
Reading edition
In the Seibert microscope use No. V objective, in Fuess microscope No. 7 objective, and in English microscopes a ¼″ or ⅕″ objective.