20 Microscope Slides
1(d). Intestinal bacteria (Escherichia coli) from putrid water
2(e). Putrefactive bacteria (Spirillum) from sludge poor in oxygen
3(d). Putrefactive bacteria (Sphaerotilus) bacteria, forming long chains
4(d). Sludge bacteria (Methanobacterium) causing sewer gas
5(d). Sulphur bacteria (Thiocystis)
6(c). Wasserbluthe (Microcystis), blue-green alga “blooming” in stagnant water
7(c). Anabaena, blue green algae, in eutrophic water
8(c). Spirogyra, filamentous green alga in nutrient-rich water
9(d). Spirulina, corkscrew-shaped algae occurring in bitter seas
10(c). Chlamydomonas, one-celled green alga in eutrophic water
11(c). Cladophora, green alga from moderately polluted water
12(c). Diatoms, mixed algae from scarcely polluted water
13(c). Euglena, green flagellates occurring in stagnant eutrophic water
14(d). Ciliates, different species from nutrient-rich water
15(d). Rotifers (Rotatoria), small animals from putrid water
16(d). Tubifex, fresh water oligochaete, living in the sludge
17(d). Carchesium, stalked ciliate from moderately polluted water
18(d). Water mold (Saprolegnia), harmful to plants and animals
19(d). Skin of fish injured by chemicals, t.s.
20(d). Skin ulcer of an amphibian, t.s.
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