| Description | Date | Identifier | |
| Comparative test report on insulating varnishes. | 20th Sep 1921 | Box 24 \ 2 Scan170 | |
| Comparative tests of standard insulating varnishes with Asiatic varnish. | 16th Sep 1921 | Box 24 \ 2 Scan171 | |
| The properties and testing of asiatic varnish compared to other varnishes. | 21th Sep 1921 | Box 24 \ 2 Scan172 | |
| Internal instruction memo regarding the properties and application of Armacell varnish compared to Asbestic varnish. | 21th Sep 1921 | Box 24 \ 2 Scan173 | |
| Product list from The Insulating & Waterproofing Compounds Company. | 21th Sep 1921 | Box 24 \ 2 Scan174 | |
| Product specification for Insulating Compound M.R. 695 from The Insulating & Waterproofing Compounds Company. | 21th Sep 1921 | Box 24 \ 2 Scan175 | |
| Product information sheet for Lamplac spirit lacquer and Invarine insulating spirit varnish. | 21th Sep 1921 | Box 24 \ 2 Scan176 | |
| Product information sheet for Racvar gut preservative and Anti-Sulphuric Enamels. | 21th Sep 1921 | Box 24 \ 2 Scan177 | |
| Technical flyer for 'Proofine', a waterproofing compound for various materials including leather and textiles. | 25th Nov 1921 | Box 24 \ 2 Scan178 | |
| Letter from Bell's United Asbestos Co. Ltd. enclosing a booklet on their articles manufactured for electrical purposes. | 25th Nov 1921 | Box 24 \ 2 Scan179 | |
| Quotation letter for insulating compounds and varnishes. | 7th Dec 1921 | Box 24 \ 2 Scan180 | |
| Letter from The L.P.S. Electrical Co. responding to an inquiry about insulating strips and foils. | 8th Dec 1921 | Box 24 \ 2 Scan181 | |
| Quote from L.P.S. Electrical Company for insulating varnished paper and silk, including pricing and delivery details. | 9th Nov 1923 | Box 24 \ 2 Scan182 | |
| Request to order a sample of insulating compound for a comparative trial for coil impregnation purposes. | 14th Dec 1921 | Box 24 \ 2 Scan183 | |
| Receipt of M.R.695 insulating varnish for comparative trial. | 7th Jan 1922 | Box 24 \ 2 Scan184 | |
| Internal instruction to order 'Elo' varnish for testing on armature and ignition coils. | 28th Feb 1922 | Box 24 \ 2 Scan185 | |
| Requesting an experimental order of 'Elo' impregnating varnish for testing on armature and ignition coils. | 3rd Mar 1922 | Box 24 \ 2 Scan186 | |
| Product information sheet for Ammanite moulded fibre components from Amalgamated Manufacturers. | 14th Mar 1922 | Box 24 \ 2 Scan187 | |
| Internal request to enquire with Messrs. Dieny & Lucas about sourcing various sizes of sistoflex insulating tubing. | 14th Mar 1922 | Box 24 \ 2 Scan188 | |
| Notes from a Cutler Hammer Co's pamphlet on the materials Thermoplax and Pyroplax. | 10th Aug 1921 | Box 24 \ 2 Scan189 | |
| Requesting machining test results for various insulating materials to complete a report. | 24th Apr 1922 | Box 24 \ 2 Scan190 | |
| Cover letter accompanying a report on tests of insulating materials. | 1st May 1922 | Box 24 \ 2 Scan191 | |
| The hardness and heat tests of various insulating materials. | 10th Apr 1922 | Box 24 \ 2 Scan192 | |
| Test report on various fibre and insulating materials, detailing results from heat, water, oil, and acid immersion tests. | 10th Apr 1922 | Box 24 \ 2 Scan193 | |
| Report comparing the properties and test results of various insulating materials like phenols, rubbers, and fibres. | 23th May 1922 | Box 24 \ 2 Scan194 | |
| Heating tests on asbestos moulded bakelite for the Goshawk II Commutator. | 23th May 1922 | Box 24 \ 2 Scan195 | |
| List of insulation materials and their suppliers for the Experimental Department. | 1st Apr 1922 | Box 24 \ 2 Scan196 | |
| Wiring interconnections for the R+R Switchbox with a Smith dynamo and other components. | 10th Aug 1920 | Box 24 \ 2 Scan197 | |
| Log sheet detailing various insulating materials, their suppliers, form, quantity and test status. | 15th Jun 1918 | Box 24 \ 2 Scan198 | |
| Performance and potential standardization of the Chloride 6 BXE5 battery. | 7th Aug 1920 | Box 24 \ 2 Scan199 | |
| Ledger detailing various materials, their suppliers, and associated properties or remarks. | 10th Sep 1920 | Box 24 \ 2 Scan200 | |
| Interconnections for a switchbox wiring scheme and a proposal for adding an inspection lamp socket. | 6th Aug 1920 | Box 24 \ 2 Scan201 | |
| Log sheet detailing various materials, their suppliers, quantities, and test usage remarks. | 19th Jul 1917 | Box 24 \ 2 Scan202 | |
| Requesting a method to distinguish positive and negative leads on non-armoured heavy current cable. | 25th Jun 1920 | Box 24 \ 2 Scan203 | |
| Supplementary list of insulation materials used in the Experimental Department. | 5th Jun 1930 | Box 24 \ 2 Scan204 | |
| Modifying a component box to improve air circulation and prevent overheating. | 4th Dec 1920 | Box 24 \ 2 Scan205 | |
| Table detailing proposed material changes for experimental electrical insulation units. | 1st Nov 1934 | Box 24 \ 2 Scan206 | |
| Report from the British Electrical and Allied Industries Research Association on hard composite insulating materials. | 21th Feb 1922 | Box 24 \ 2 Scan207 | |
| Directions for the study and testing of hard composite dielectrics and insulating materials, including electrical tests and temperature grading. | 21th Feb 1922 | Box 24 \ 2 Scan208 | |
| Specification for testing the resistivity of hard composite dielectrics and insulating materials. | 21th Feb 1922 | Box 24 \ 2 Scan209 | |
| Directions for testing the electrical and surface resistivity of various materials such as tubes, sheets, rods, and moulded materials. | 21th Feb 1922 | Box 24 \ 2 Scan210 | |
| Specification for testing the electric strength and toughness of hard composite dielectric materials. | 21th Feb 1922 | Box 24 \ 2 Scan211 | |
| Directions for the study and testing of material properties, detailing specimen dimensions and procedures for plastic yield and strength tests. | 21th Feb 1922 | Box 24 \ 2 Scan212 | |
| Page detailing test procedures for hard composite insulating materials, including cross-breaking strength and crushing tests. | 21th Feb 1922 | Box 24 \ 2 Scan213 | |
| Directions for studying materials, detailing test procedures for crushing load, ageing, density, water absorption, and tool wear. | 21th Feb 1922 | Box 24 \ 2 Scan214 | |
| Specifications and testing procedures for hard composite dielectrics and insulating materials, including tool wear and chipping tests. | 21th Feb 1922 | Box 24 \ 2 Scan215 | |
| Directions for the study and chipping test of hard composite dielectrics. | 21th Feb 1922 | Box 24 \ 2 Scan216 | |
| Directions for determining the electric strength of fibrous insulating materials. | 21th Feb 1922 | Box 24 \ 2 Scan217 | |
| Address to the Western Centre regarding the structure and financing of electricity supply authorities. | 21th Feb 1922 | Box 24 \ 2 Scan218 | |
| Research tests on the electric strength of fibrous insulating materials. | 21th Feb 1922 | Box 24 \ 2 Scan219 | |
| Directions for determining the electric strength of materials using voltage, time, and temperature curves. | 21th Feb 1922 | Box 24 \ 2 Scan220 | |
| Technical specification page detailing testing procedures for fibrous insulating materials. | 21th Feb 1922 | Box 24 \ 2 Scan221 | |
| Directions and diagrams for determining the electric strength of materials in tube, cylinder, and sheet form. | 21th Feb 1922 | Box 24 \ 2 Scan222 | |
| Page outlining tests on fibrous insulating materials, specifically focusing on electric strength. | 21th Feb 1922 | Box 24 \ 2 Scan223 | |
| Directions for determining the electric strength of materials, including conditioning samples and test apparatus. | 21th Feb 1922 | Box 24 \ 2 Scan224 | |
| Test setup and results for determining the electric strength and temperature rise of fibrous insulating materials under A.C. voltage stress. | 21th Feb 1922 | Box 24 \ 2 Scan225 | |
| The method for testing the electric strength of fibrous insulating materials. | 11th Dec 1922 | Box 24 \ 2 Scan226 | |
| Request for a report on machining tests of insulating materials and for ebonite to construct an insulating table. | 11th Dec 1922 | Box 24 \ 2 Scan227 | |
| Instructions for a breakdown voltage test on insulating materials such as bakelite. | 26th Jan 1923 | Box 24 \ 2 Scan228 | |
| Instructions and results for a voltage breakdown test on various insulating materials. | 26th Jan 1923 | Box 24 \ 2 Scan229 | |
| Test results and observations on the electrical breakdown of various materials. | 26th Jan 1923 | Box 24 \ 2 Scan230 | |
| Test report on electrode failures, noting unsatisfactory contact pressure and arcing at high voltage. | 26th Jan 1923 | Box 24 \ 2 Scan231 | |
| Various tests of insulating materials, including machining and strength tests. | 30th Jan 1923 | Box 24 \ 2 Scan232 | |
| Comparative loading and high voltage breakdown tests on Stabalite and Beldalite materials. | 30th Jan 1923 | Box 24 \ 2 Scan233 | |
| Electrical breakdown voltage tests on various insulating materials. | 1st Jan 1923 | Box 24 \ 2 Scan234 | |
| The test results and analysis of various material specimens, discussing breakdown voltage. | 30th Jan 1923 | Box 24 \ 2 Scan235 | |
| The study and testing of untreated electrical insulating papers for purposes other than cable manufacture. | 30th Jan 1923 | Box 24 \ 2 Scan236 | |
| Index and preface for a report on the study of paper materials and their testing methods for electrical insulation. | 30th Jan 1923 | Box 24 \ 2 Scan237 | |
| List of definitions for various types of untreated electrical insulating papers. | 30th Jan 1923 | Box 24 \ 2 Scan238 | |
| Guide to the study of different types of Japanese tissue paper and their manufacturing processes. | 30th Jan 1923 | Box 24 \ 2 Scan239 | |
| Specification detailing test procedures for untreated electrical insulating papers. | 30th Jan 1923 | Box 24 \ 2 Scan240 | |
| Directions for testing the physical and chemical properties of paper. | 30th Jan 1923 | Box 24 \ 2 Scan241 | |
| Diagram of an apparatus used for measuring the tearing strength of untreated electrical insulating papers. | 30th Jan 1923 | Box 24 \ 2 Scan242 | |
| Page detailing chemical analysis procedures for materials, likely paper, including tests for sizing, mineral ash, and nitrogenous content. | 30th Jan 1923 | Box 24 \ 2 Scan243 | |
| Specification outlining testing procedures for untreated electrical insulating papers. | 30th Jan 1923 | Box 24 \ 2 Scan244 | |
| Directions for studying paper, including apparatus for measuring porosity and flash testing for conducting particles. | 30th Jan 1923 | Box 24 \ 2 Scan245 | |
| Schedule of uses, tests, and suitable types of untreated electrical insulating papers. | 30th Jan 1923 | Box 24 \ 2 Scan246 | |
| Page from a study guide showing microscopic views of different fibers. | 30th Jan 1923 | Box 24 \ 2 Scan247 | |
| Page showing microscopic images of fibres used in untreated electrical insulating papers. | 2nd Feb 1922 | Box 24 \ 2 Scan248 | |
| Method for testing paper direction and the proceedings of two institutional meetings. | 2nd Feb 1922 | Box 24 \ 2 Scan249 | |
| Product data sheet for 'ABCO' Tan Fibre asbestos packing from Arthur Bates & Co., Ltd. | 2nd Nov 1922 | Box 24 \ 2 Scan250 | |
| Test report on the properties of Redmanol Varnish. | 6th Mar 1924 | Box 24 \ 2 Scan251 | |
| The properties and stability of a varnish sample under various test conditions. | 29th Jun 1920 | Box 24 \ 2 Scan252 | |
| Instruction sheet detailing the flammability characteristics of a varnish. | 29th Jun 1920 | Box 24 \ 2 Scan253 | |
| Further tests on Redmanol Varnish after a baking process. | 16th May 1924 | Box 24 \ 2 Scan254 | |
| Instruction sheet noting the discontinuation of a test due to the inability to check water absorption. | 28th Aug 1920 | Box 24 \ 2 Scan255 | |
| Request to test two samples of insulating sleeving ('Sistoflex' and 'Derby') under the bonnet of an experimental car. | 14th Jun 1924 | Box 24 \ 2 Scan256 | |
| Request for a report on a sample of insulating sleeving. | 2nd Aug 1924 | Box 24 \ 2 Scan257 | |
| Potential use of a new moulding material called Celastine for electrical fittings. | 2nd Sep 1924 | Box 24 \ 2 Scan258 | |
| Properties and potential use of a material sample called 'Black Sheet Redmanol'. | 27th May 1924 | Box 24 \ 2 Scan259 | |
| Sales letter from The Standard Insulator Co Ltd promoting insulating sleeving and enamelled copper wire. | 16th Jun 1925 | Box 24 \ 2 Scan260 | |
| Price list for 'Hivoltsit' insulating sleeving for automobile cables. | 21th Nov 1925 | Box 24 \ 2 Scan261 | |
| Covering letter for a sample of Flexible Insulating Sleeving from Messrs. McLeod & McLeod. | 21th Nov 1925 | Box 24 \ 2 Scan262 | |
| Sales letter from McLeod & McLeod regarding flexible insulating sleeving. | 11th Nov 1925 | Box 24 \ 2 Scan263 | |
| Price list for 'Doelcam' varnished flexible insulating sleeving. | 11th Nov 1925 | Box 24 \ 2 Scan264 | |
| Request to Holder-Harriden for a catalogue of Insulating Beads. | 16th Feb 1926 | Box 24 \ 2 Scan265 | |
| Order for insulating beads from Holder-Harriden Ltd. | 2nd Feb 1926 | Box 24 \ 2 Scan266 | |
| Procuring samples of 'Marconite' insulating varnish for assessment. | 2nd Feb 1927 | Box 24 \ 2 Scan267 | |
| Use of Marconite Varnish, advising against changing from the current synthetic varnish without further testing. | 25th Mar 1927 | Box 24 \ 2 Scan268 | |
| Rectifying unit for high voltage D.C. insulation testing. | 29th Apr 1927 | Box 24 \ 2 Scan269 | |
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