Offered at Auction, a fine Antique Microscope Slide of Selected Diatom Forms "Cresswellia ??? ~ Virginia, US" by early English Diatomist Laurence Hardman, London. Unusually, some of the forms have been mounted to display the girdle view. The species name may be related to the following...

All auction images were taken from the actual slide(s) using various methods and techniques appropriate to the specimen. These include Brightfield, Darkfield, Oblique, Crossed Polarizing Filters (Polariscope) with and without Selenites, Phase Contrast, DIC, etc.

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Antique Microscope Slide Selected Diatoms ~ Cresswellia ??? ~ by L Hardman