Details
A Stage Micrometer slide,
- 1 and 01 millimeter by W. Watson & Sons LTD., in case; Diatomacese: a remarkable series of 300 species on three slides with descriptive leaflet; and a series of eighty-seven test forms on four slides with associated descriptive leaflet (A Lot)
- 1 and 01 millimeter by W. Watson & Sons LTD., in case; Diatomacese: a remarkable series of 300 species on three slides with descriptive leaflet; and a series of eighty-seven test forms on four slides with associated descriptive leaflet (A Lot)