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
[1]
Daemen-Schmid & Co.
Anleitung für die Messrechenkunst mittels der Rechenwalze "Loga". Zürich Schweiz (1912).