"The Educated Monkey was patented in 1916. These are the directions from the cardboard cover:

'When the monkey's feet are set to point at two numbers, its fingers will locate their product. It teaches the complete multiplication table. It teaches the complete addition table. It can add, subtract, multiply and divide, or factor elementary numbers. Its link motion makes a mathematical puzzle which has advanced students guessing. Try an expert with it. 

It is a classic in the toy line. A device which interests young and old. IT MAKES NO DIFFERENCE TO THE MONKEY WHETHER CHILDREN ARE BRIGHT OR STUPID. HE NEVER LOSES PATIENCE AT HAVING TO ANSWER THEIR QUESTIONS.'"  

Art Rosen.

Courtesy of: Art Rosen

Sorry – the capacity of this device is not state of the art." Reinhard Atzbach
10/18/2001