Otto's Encyclopedia

Otto's Encyclopedia (Czech: Ottova encyklopedie or Ottův slovník naučný), published at the turn of the 20th century, is the largest encyclopedia written in Czech. For its scope and the quality of the writing, it is comparable to the greatest world encyclopedias of its time, such as Encyclopædia Britannica.[1]

Page number 934 from the 20th volume of Otto's Encyclopedia dealing with birds includes a diagram of the brain of a pigeon (left) and a cross-section of the eye of a night predatory bird (right).
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