Testing a Rotary
Movie| Title | Testing a Rotary |
| User score | 4.2 |
| Release date | May 1, 1904 |
| Genre | Documentary, History |
| Director | Billy Bitzer |
| Production country | United States of America |
| Production companies | American Mutoscope & Biograph, Westinghouse Electric Company |
| Run time | 3 min. |
A small group of men turn on what appears to be a generator. As the rotary spins, the men make adjustments to the machine and check its operations.
