^^ix Video.

1. ix Video pendolo.
2. ix Video PSSC ani. | cmt

Numberphile

The Three Square Geometry Problem

Triangle Centres and the Euler Line (extra footage)

wp/List_of_Encyclopedia_Britannica_Films_titles

1. TheVacuumTubeInRadio
2. heat_its_nature_and_transfer
3. Electrons_201512
4. 329701166 evaporation
5. blogs.libraries.indiana.edu/filmarch/discoveries-within-encyclopaedia-britannica-films/