A fantastic antique blackboard coloured diagram of the arterial and venous systems of a frog.

Circa 1930s from The Biological Laboratory at Oundle School in North Hamptonshire. W.J.Batt was a biological curator at the Oundle school from 1925 and later a biological demonstrator. He assisted in annual biological expeditions and gave a talk to the Natural History Society in 1932 on the colouration of living organisms. Part of The Biological Series, published by Sidgwick & Jackson Ltd Publishers, London.

It is 108cm long and 77cm wide. The diagram has brass ring inserts for hanging and is backed with muslin.

It has marks and wear commensurate with its age and previous use as indicated in the photographs.