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Take a jar and fill it up with plain water.
Now, place an onion bulb over the jar in such a way that its base bearing roots, is immersed in the water.
Take one or two preserved roots, wash them in water and then, place them on a clean slide.
Put one drop of dilute Hydrochloric acid (HCl) on the root tips to soften the tissue. Rinse the roots after 10–15 minutes. Then add 2–3 drops of aceto-carmine stain on them.
Leave the slide for 5–10 minutes and then, gently warm it (with caution) over a spirit lamp.
Cut the tip portion of the root on the slide and put a coverslip. Gently squash the coverslip with your thumb to spread the cells on the slide.
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