In 1865, with Louis-Antoine Ranvier (1835-1922), he founded a private laboratory. Here Cornil taught pathological anatomy and Ranvier gave classes in standard anatomy. With Victor Babeş (1854-1926), he wrote an important paper on bacterial infections titled Les bactéries et leur rôle dans l’anatomie et l’histologie pathologiques des maladies infectieuses,Petri dish (www.whonamedit.com) at whonamedit.com and with Ranvier, he published an influential manual of histopathology called Manuel d'histologie pathologique.
