Saturday, July 11, 2009

Bead Frame Madness

Chinese Suan Pan:

Antique Japanese 1:5 Soroban:

Modern Japanese 1:4 Soroban:

9-Bead "Nonus" abacus:


Blogger andrew said...

Joe, I read your paper on the Nonus abacus and I'm interested in purchasing one that meets your specifications, specifically 9 beads with alternating colors.


8:19 PM  
Blogger Joe V said...

Andrew: if you could include an email link on your blog, we can talk offline about getting you a 9-bead abacus. Or contact me at: < j v c a b a c u s (at) y a h o o DOT c o m>

5:59 AM  

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