Two slides showing Pinnularia major arrangements. Olympus BHB microscope using 450nm LED light. First, by Watson and Sons Ltd.
An arrangement of five diatoms from Inverness, Scotland. As well as the arrangement which was imaged using a 20x Nikon Plan Apo NA 0.65 objective, with oblique lighting, I imaged one using the 63x Leitz Pl Apo 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 52 images stacked in Zerene (Pmax).
Second, and arrangement showing 2 views by William Allott Firth, from Aberdeen, Scotland.
20x Nikon Plan Apo NA 0.65 objective. Olympus Aplanat Achromat condenser, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 41 images stacked in Zerene (Pmax).
Pinnularia major (Kützing) Rabenhorst 1853. Published in: Rabenhorst, L. (1853). Die Süsswasser-Diatomaceen (Bacillarien.): für Freunde der Mikroskopie. pp. [1]-xii, [1]-72, 10 plates [I–X]. Leipzig: Eduard Kummer. Page 42, Plate 6, Figure 5.