Plastkarbis 12 preparaati. 1. Diatoms, t.p. 2. Spirogira, t.p. 3. Volvokss, t.p. 4. Mold, t.p. 5. Aspergillus, t.p. 6. Mushroom cup, sec. 7. Linden tree: 1-year, 2-year, 3-year old stem on one slide, c.s. 8. Monocotyledon and Dicotyledonous stem cut on one slide, c.s. 9. Wheat leaf, c.s. 10. Sunflower leaf, c.s. 11. Lily, stamen with mature pollen, c.s. 12. Lily, pistil, c.s.