H.R.S.Williams Antique Microscope Slide. 11 Selected Diatoms

J.D.Moller Antique Microscope Slide. Isthmia Enervis Diatoms

Antique microscope slide by A.C.Cole. "Selected Diatoms from Smyrna".

Vintage microscope slide by R.I.Firth. Diatoms. Triceratium glandiferum. Oamaru.

Vintage microscope slide by C.N.Walter. Diatoms. Hyalodiscus subtilis. Russia.

Antique microscope slide. Diatoms. Selected Navicula lyra. Yokohama.

Antique microscope slide by A.C. Cole. H.M.S. Challenger. Diatoms. 2000 fathoms

Antique microscope slide. Diatoms. "Denticula debyi from Java".