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).
Appendix 3 detailing the method of sampling and precautions to avoid contamination.
| Identifier | ExFiles\Box 27a\4\ Scan106 | |
| Date | 2nd May 1933 guessed | |
| -5- APPENDIX 3. Method of Sampling. It is important that the following precautions be taken in sampling in order to avoid the introduction of extraneous matter which might cause erratic gumming. (a) The bottles, preferably narrow necked and glass stoppered, should be washed in chromic-acid solution, then rinsed with distilled water, and dried. (b) If corks are used, these should be new and extracted with acetone and preferably wrapped around with tin or lead foil. (c) The glass dipper, or syphon, etc. used for removing the sample from the container, should be frequently rinsed with acetone and dried in order to remove any gum. (d) The sample bottle should be filled completely. (e) Wrapped or packed in a light proof container. (f) Stored in a cool place until required for analysis. | ||