From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Page showing microscopic images of fibres used in untreated electrical insulating papers.
| Identifier | ExFiles\Box 24\2\ Scan248 | |
| Date | 2nd February 1922 guessed | |
| ELECTRICAL INSULATING PAPERS (UNTREATED). 669 Fig. 5.—(c) Jute and chemical wood-pulp. Fig. 5.—(d) Chemical wood-pulp. Fig. 5.—(e) Mechanical wood-pulp. Fig. 5.—(f) "Paper mulberry." | ||