# Source: Linda Hall Library — Philo Farnsworth Scientist of the Day

**Type:** source
**Status:** Useful
**Confidence:** High
**Source Type:** University Page
**URL:** https://www.lindahall.org/about/news/scientist-of-the-day/philo-farnsworth/
**Publisher:** Linda Hall Library (Kansas City, MO)
**Accessed:** 2026-06-19
**Updated:** 2026-06-19
**Relates:** cites [Philo Farnsworth and Electronic Television](philo-farnsworth-television.md)

## Summary

The Linda Hall Library's Scientist of the Day profile on Philo Farnsworth, covering his San Francisco laboratory, the image dissector camera tube, the receiver display tube, and the September 7, 1927 all-electronic television demonstration. The Linda Hall Library is one of the largest independent science research libraries in the United States.

## Useful Claims

- Farnsworth conducted his landmark electronic television work in a San Francisco laboratory, not in Utah.
- The image dissector (camera tube) and a paired receiver display tube were the two core vacuum-tube components of his television system.
- The system was fully electronic — no spinning disks or mechanical scanning elements.
- The September 7, 1927 demonstration successfully transmitted an electronic image.

## Reliability Notes

The Linda Hall Library is a well-regarded independent science research library whose Scientist of the Day series is produced for scholarly public education. It is a high-quality secondary source drawing on established historical scholarship. It is not a primary source but is appropriate for corroborating technical and biographical claims about Farnsworth.

## Related Pages

- [Philo Farnsworth and Electronic Television](philo-farnsworth-television.md)