Complex sentence: Sellers nearly dropped it because it was so hot, and Eckfeldt reminded him it had been cold when placed in the press, and bade him keep the coin until he learned why the cent had become hot, and then he could spend it on candy.
Split into simpler sentences: Sellers nearly dropped it because it was so hot, and Eckfeldt reminded him it had been cold when placed in the press. Eckfeldt bade him keep the coin until he learned why the cent had become hot, and then he could spend it on candy.