A roll down educational poster printed on canvas, this particular version of this print dates between 1902-1910. The print is named: "Infusoria Ciliata" or in English "Ciliates" (a species of life form where ever there is water).
This is a zoological illustration from real of the ciliates by famous Austrian zoological illustrator Paul Furtscheller who first drew these in the 1890s.
Printed on canvas which nicely rolls away. These charts were used for purpose so signs of use & ageing is inevitable. Though it is these signs of use & aging that give them great unique character.