Entitled: "Medical research on methods of poisoning." The use of poison as a murder weapon goes back thousands of years. Toxicology is a branch of biology, chemistry, and medicine concerned with the study of the adverse effects of chemicals on living organisms. The goal of toxicity assessment is to identify adverse effects of a substance. Adverse effects depend on two main factors: 1) routes of exposure (oral, inhalation, or dermal) and 2) dose (duration and concentration of exposure). To explore dose, substances are tested in both acute and chronic models. Generally, different sets of experiments are conducted to determine whether a substance causes cancer and to examine other forms of toxicity. No artist credited, undated.