Read "Of Those Sentiments Concerning Nature with Which Philosophers Were Delighted" by Plutarch online for free on Textopian. Full text with search, annotations, highlights, and AI-powered reading aids.
Empedocles, precedent to the four elements, introduceth the most minute bodies which resemble elements; but they did exist before the elements, having similar parts and orbicular.
Heraclitus brings in the smallest fragments, and those indivisible.