Mathematical Instruments
Mechanical Instruments for Drawing, Measuring and Integrating
Drafting Instruments
Hommel-Esser Aarau
Kern & Co. Aarau
Gysi & Co. Aarau
J. Bossart Suhr-Aarau
Various Makers
Drafting Set
Proportional Divider
Transvere Map Scale (F. Kuhn)
Measuring Compass (Bartolome April)
Ellipsograph (Pat. H. Sieber)
Elliptical Compass (Scholl)
Ellipsodem (Racher)
Rechenscheiben und Rechenwalzen