Contents: Trypanosomes in rat blood (st, sm, 1,500X) • Soybean root nodules (st, cs, 100X) • Nematode on tomato root (wm, 200X) • Green paramectum (wm, 200X) • Rust on willow leaf (st, cs, 200X) • Lichen (st, cs, 200X) • Fungus on fish (wm, 5X) • Virus on bacteria in man (em, 45,000X).
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