41. Recommendations for repair and allied processes for the conservation of documents. Recommendations for treatment of sheets, membranes and seals. (30th September 1988) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (20 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
42. Recycled mineral insulating oil for transformers and switchgear. Specification. (30th March 2020) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (14 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
43. Routine control methods of testing water used in industry. (1st February 1968) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (54 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
44. Sampling and examining deposits from boilers and associated industrial plant. Methods for sampling and examining fire-side deposits Part 2, (30th December 1983) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (56 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
45. Specification for 1, 1, 2-trichlorotrifluoroethane (R 113). (31st October 1972) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (14 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
46. Specification for 2-ethylhexan-1-ol for industrial use. (31st July 1991) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (8 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
47. Specification for bitumen-based filling compounds for electrical purposes. (3rd October 1973) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (20 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
48. Specification for boric acid and boric oxide, technical grades. (30th June 1980) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (4 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
49. Specification for crude vegetable fats. (30th April 1990) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (10 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
50. Specification for diacetin (glyceryl diacetate). (24th March 1950) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (11 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗