The ornamental design for a holder for microscopeslides, as shown and described.
1. Holder for microscope slides
1.1: Front
1.2: Back
1.3: Left
1.4: Right
1.5: Top
1.6: Bottom
1.7: Cross sectional
1.8: Enlarged
1.9: Perspective
1.10: Perspective
1.11: Enlarged
1.12: Enlarged
This article is a holder for microscope slides that holds a plurality of microscope slides, each of which is a rectangular glass plate to be observed with a microscope, the rectangular glass plate being arranged side by side; the indicator line in FIG. 1.1indicates the cross-sectional position; the indicator lines in FIGS. 1.7, 1.9and 1.10represent the expansion range.