| RefNo | ACS/1/2/4/498 |
| AltRefNo | 636 |
| Level | Item |
| Title | Letter from [Alan Archibald Campbell] Swinton, to Messrs. The Incandescent Heat Co. Ltd., Cornwall Road, Smethwick, Birmingham |
| Creator | Swinton; Alan Archibald Campbell (1863-1930); British electrical engineer |
| Date | 20 November 1929 |
| Description | Comments that in a paper before the Royal Society, he mentioned that a gas flame burning with a mantle gives the heat efficiency if the mantle were composed of 99% of thorium oxide and 1% of corium oxide. Enquires if this mixture is still more effective that all others. |
| Extent | 1p |
| Format | Typescript |
| PhysicalDescription | Carbon |
| AccessStatus | Open |