MULTIMEDIA-PACKAGE. Identifying polluted water under the microscope, Basic Set of 6 slides and teaching material, Teacher Set

SME-43 MULTIMEDIA TEACHER PACKAGE. Identifying polluted water under the microscope, Basic Package of 6 items. Comprising: 6 Microscope Slides in Plastic Box, 3 OHP Color Transparencies, 6 Sketch- and Worksheets, Brochure with explanatory text, Special cardboard box. 1. Intestinal bacteria (Escherichia coli) from putrid water - 2. Putrefactive bacteria (Spirillum) from sludge poor in oxygen - 3. Sludge bacteria (Methanobacterium) causing sewer gas - 4. Wasserbluthe (Microcystis), blue-green alga "blooming" in stagnant water - 5. Ciliates, different species from nutrient-rich water - 6. Water mold (Saprolegnia), harmful to plants and animals.