Mathematical Instruments
Mechanical Instruments for Drawing, Measuring and Integrating
Drafting Instruments
Rechenscheiben und Rechenwalzen
Billeter / National
Daemen-Schmid / Loga
Cylindrical Slide Rule
Pointer for Cylindrical Slide Rule
Talcum Cans for Cylindrical Slide Rule
Slide Rule
Circular Slide Rule
Planimeters and Integrators