Knowledge builders series

6 films in this series.

Title ▲	Year	Creator	Length	Format	Color	Sound
How The Ear Functions.	1941	Karl Kurt Bosse; Knowledge Builders	11 min	16mm	B&W	sound
How the Eye Functions	1940	Knowledge Builders	22	16mm	B&W	sound
Our Teeth	1941	Knowledge Builders	22	16mm	B&W	Sound
The Story Of Coal	1938	Knowledge Builders	1R	16mm		sound
The Story Of Electricity	1941	Knowledge Builders	11 min	16mm		sound
The Story Of Wheat	1940	Knowledge Builders	10 min	16mm		sound