This item is a calculator made by Dr. Tathujiro Sasaki, Mr. Ryo Shiga and others for working out nine simultaneous linear algebraic equations. The original machine was designed and made by Dr. John B. Wilbur in 1936. Some machines of this type were made in the world. However all of them seemed to disappear except this Japanese one. This report shows some details of this machine, which was researched for an exhibition"The Heroes of Information Age"at the National Science Museum in between March 6 and June 5,2001.
Bulletin of the National Science Museum. Series E, Physical Sciences & Engineering 24 25-29, 2001
National Science Museum