Life before Powerpoint.

This very large canvas-backed wall-chart dates to the early 1900s. It was used to instruct university natural history students in those happy days before Powerpoint presentations existed. Such charts were hung up at the front of a lecture theatre and being of large size were visible at the back of the room. They were a standard teaching aid used by Universities all over the world. 
This particular chart, rescued from a skip in the 1980s, was published by Remy Perrier & Cepede of Paris. Attached to the back  there is a small label stating it that it was retailed by a company founded by a scientific hero of mine, the Frenchman Dr Louis Auzoux. 
The skulls on the chart include the lion, bear, sabre-toothed tiger, dog, hyaena and mongoose.