The Tree in a Test Tube (1942) is a Documentary film that follows stan Laurel and Oliver Hardy are stopped by narrator Pete Smith for the purpose of showing the audience how much wood and wood by-products the average person carries. The Tree in a Test Tube is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 5.2 out of 10 from 19 votes. Fans of documentary movies may also want to explore similar titles below.