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It can be postulated from Alberti's writings that this cipher device may have been created for high level secret use within the Vatican
Measures about 7” square in the frame
Made from durable maple and alder wood
This is for the PIECES ONLY
How It Works
Napier's Bones - Quickly teach Your Child Math With This Montessori Toy escape roomw aiting room puzzle It can be postulated fromDesigned by John Napier in 1617, Napier's Bones is a fantastic way to explain and help your child understand how basic math functions. Consider the first "calculator" Napier's Bones is an invaluable to in any classroom environment. Whether you are a teacher in a traditional classroom or a parent homeschooling this is an essential ingredient to you curriculum. The frame measures 7. 5" x 7. 5" and the rods are cut from 1 8" thick alder wood. Two full
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