Brass rule of triangular cross-section like Jackson's "charto-metrometer"

Brass rule of triangular cross-section like Jackson's

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Brass rule of triangular cross-section like Jackson's
Science Museum Group
© The Board of Trustees of the Science Museum

Brass rule of triangular cross-section like Jackson's "charto-metrometer" but here engraved with name of inventor Gustave Rogister and maker Ertel & Sohn, Munich, 1843

Details

Category:
Mathematics
Object Number:
1990-633
Materials:
brass
type:
rule (triangular)
credit:
Tesseract