Excerpt from The Illuminating Engineer, Vol. 10: Jan. 1917 to Dec. 1917The discussion on this subject at the last meeting of the Illuminating Engineering Society marks an important stage in our progress towards more scientific and definite methods of comparing sources of light. 'the origination of the Lumen, as a measure of flux of light, and as a basis of comparison of the
| Title | : | The Illuminating Engineer, Vol. 10: Jan. 1917 to Dec. 1917 (Classic Reprint) |
| Author | : | Illuminating Engineering Society |
| Language | : | en |
| Rating | : | |
| Type | : | PDF, ePub, Kindle |
| Uploaded | : | Apr 11, 2021 |
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