Laboratory and Yellow Room are in a pavilion at the end of the park, about three hundred metres (a thousand feet) from the chateau.

Lloyd's discovery of the "death bacillus" of the sea toad, and his experiments on it with potassium cyanide, sent his name and that of his university ringing round the world; nor was Paul a whit behind when he succeeded in producing laboratory colloids exhibiting amoeba-like activities, and when he cast new light upon the processes of fertilization through his startling experiments with simple sodium chlorides and magnesium solutions on low forms of marine life.

A journalist obtained access to his laboratory in the capacity of laboratory-assistant, with the deliberate intention of making sensational exposures; and by the help of a shocking accident