Spline made of celluloid
Model 561
Description
Spline made of celluloid showing the radius of curvature, logarithmic spiral (can also be used for the graphical integration of differential equations of 2nd order according to the method by Boys and Rothe or Meissner).
The model pictured above is not the model described here. The described model was marked as missing in 1950.
Showcase of this model is Case number U 45
References
Separataband M5 im Mathematischen Institut p. 209-210.