Compound Microscope

Does not have to be fancy but should have phase-contrast lenses and condensor and, at a minimum, a low-magnification dry lens (16x is fine) and a 100x oil-immersion lens. A 40x high-dry lens is useful as is a 63x oil. Mount them in the order 100x-63x-16x-40x to lower the chance of swinging the 40x through the oil by mistake. Photographic capability is not needed. Because orcein is a red dye, a green filter will be helpful for increasing contrast. The stage must be translatable and vernier markings on it are very nearly vital.

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