1. 

   3 months ago

   1930s German Spiral Jack

   1980
2. 

   10 months ago

   Construction of an Archimedean Spiral of Two Convolutions

   teejaygrace
3. 

   10 months ago

   Construction of an Archimedean Spiral of one Convolution 2

   teejaygrace
4. 

   10 months ago

   Construction of Archimedean Spiral of one Convolution 1

   teejaygrace
5. 

   7 months ago

   CENTRIFUGAL VERTICLE SPIRAL WHEEL.

   FreeEnergyConcepts