Gustav Robert Kirchhoff mb-code 42-36268195 Abacus-like mathematical instrument consisting of

Description

Abacus-like mathematical instrument consisting of 384 moving squares intended for calculation

View of Langham Place and Portland Place

on the right the 'Greenwich to Blackheath Machine' has overturned

'From Liege to Aix-la-Chapelle

Mike Buckley

Gustav Robert Kirchhoff mb-code 42-36268195 Abacus-like mathematical instrument consisting of

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