 His most famous experiments are described in his magnum opus "Esperienze Intorno alla Generazione degl'Insetti" ("Experiments on the Generation of Insects"), published in 1668.He disproved that vipers drink wine and could break glasses, and that their venom was poisonous when ingested.He correctly observed that snake venoms were produced from the fangs, not the gallbladder, as was believed.