The airplane was beginning to take hold *
-Charles Lindbergh made the first trans-continental flight *
-  Vladimir Zworykin invented the television camera *
- Clarence Birdseye marketed the first frozen food. *
- Robert H. Goddard built first liquid fuel rocket. *
- John D. and Mack D. Rust invented a mechanical cotton picker *
- Warner Brothers produced the first full-length motion picture with spoken dialogue *
- The iron lung was invented to help polio patients breathe.  * ~
- Phenobarbital was used for the first time to control epileptic seizures. ~
- Diseases such as tuberculosis, diphtheria, and smallpox were brought under control ~
- Alexander Fleming discovered penicillin. ~
- Anesthesia improvements made surgery safer and less painful ~
- Many synthetic fibers were invented, such as celanese. ~
- Cellophane wrap was developed ~
- People began experimenting with television broadcasting * ~
 

* (Roberts 382)
~ (Davidson 559)