| Description | Date | Identifier | |
| The performance of experimental batteries compared to the standard battery. | 3rd Mar 1925 | Box 35 \ 1 scan 169 | |
| Distributing notes on magnetism, the design of magnetos and magneto generators, and the magnetisation of magnets. | 15th Mar 1916 | Box 35 \ 1 scan 170 | |
| Notes on the principles of magnetism, defining concepts like magnetic force, magnetisation, and induction. | 29th Oct 1920 | Box 35 \ 1 scan 171 | |
| Page from a document explaining the principles of magnetic force and magnetisation. | 11th Aug 1930 | Box 35 \ 1 scan 172 | |
| Page explaining the principles of magnetic fields, magnetisation, and magnetic induction. | 11th Aug 1930 | Box 35 \ 1 scan 173 | |
| Explaining the principles of free magnetism and magnetic induction. | 11th Aug 1939 | Box 35 \ 1 scan 174 | |
| Definition and explanation of the properties of a 'rigidly magnetised body' and its associated magnetic field. | 11th Aug 1920 | Box 35 \ 1 scan 175 | |
| Explanation of the process of magnetisation and the resulting self-demagnetising force. | 12th Aug 1921 | Box 35 \ 1 scan 176 | |
| Explanation of magnetic principles using a soft iron ring, covering magnetisation and the effect of creating a gap. | 11th Aug 1920 | Box 35 \ 1 scan 177 | |
| Page discussing demagnetising fields, magnetic induction, and the effect of air gaps in permanent magnets and magnetos. | 11th Aug 1920 | Box 35 \ 1 scan 178 | |
| Permanent magnetisation, flux leakage, and the differences between magneto and electro-magnet circuits. | 11th Aug 1920 | Box 35 \ 1 scan 179 | |
| Page discussing magnetisation, the use of soft iron keepers, and the effects of tapering magnet pole ends on tractive effort for a magneto. | 11th Aug 1920 | Box 35 \ 1 scan 180 | |
| Sketch comparing two U-shaped components under different loads. | 11th Aug 1910 | Box 35 \ 1 scan 181 | |
| Request to ascertain the attractive force between the armature and pole piece of a dynamo and motor. | 11th Oct 1921 | Box 35 \ 1 scan 182 | |
| Table of calculations for dynamo tension and induction values. | 14th Oct 1921 | Box 35 \ 1 scan 183 | |
| Letter from Vickers Limited regarding the properties of their Cobalt Chrome Steel for use in permanent magnets. | 11th Jul 1922 | Box 35 \ 1 scan 184 | |
| Returning correspondence regarding special magnet steel, also known as Cobalt Chrome. | 19th Jul 1922 | Box 35 \ 1 scan 185 | |
| Comparative performance report on the Dixie Magneto. | 16th Nov 1915 | Box 35 \ 1 scan 186 | |
| Comparison of different magneto types with their advance, central, and retard values. | 16th Nov 1915 | Box 35 \ 1 scan 187 | |
| Acquisition and testing of Dixie magnetos for 12-cylinder engines. | 16th Nov 1916 | Box 35 \ 1 scan 188 | |
| Attempt to obtain two machines, which was later abandoned. | 3rd Jan 1917 | Box 35 \ 1 scan 189 | |
| Index page for various Dixie magneto models and tests. | 13th Nov 1916 | Box 35 \ 1 scan 190 | |
| Possibility of experimenting with Fellows magnetos, including a press extract. | 13th Nov 1916 | Box 35 \ 1 scan 191 | |
| Page 2 of a document describing a magneto's construction and testing specifications. | 15th Feb 1916 | Box 35 \ 1 scan 192 | |
| Requesting an investigation into the performance of Fellows Magnetos following the War. | 18th Jun 1919 | Box 35 \ 1 scan 193 | |
| Acquisition of a Fellows Magneto for experimentation on a 6-cylinder car. | 24th Jun 1919 | Box 35 \ 1 scan 194 | |
| Requesting the acquisition of a six-cylinder Fellows Magneto for inspection and testing. | 26th Jun 1919 | Box 35 \ 1 scan 195 | |
| Request to obtain a 6-cylinder Fellows Magneto for experimental tests. | 27th Jun 1919 | Box 35 \ 1 scan 196 | |
| Letter from Fellows Magneto Company regarding specifications for a 6-cylinder magneto for experimental tests. | 3rd Jul 1919 | Box 35 \ 1 scan 197 | |
| Letter from Fellows Magneto Company Ltd. regarding a recent visit and an enquiry about a 6-cylinder magneto. | 21th Jul 1919 | Box 35 \ 1 scan 198 | |
| Price and illustration list for British-made Fellows Magnetos. | 1st Jun 1919 | Box 35 \ 1 scan 199 | |
| Receipt and potential purchase of a 6 cylinder Fellows' magneto. | 11th Aug 1919 | Box 35 \ 1 scan 200 | |
| Trial of a Magneto from the Fellows Co., to be considered on loan. | 18th Aug 1919 | Box 35 \ 1 scan 201 | |
| The testing status of Fellows magneto types E.M.6 and E.S.6. | 1st Sep 1919 | Box 35 \ 1 scan 202 | |
| Letter from Fellows Magneto Company offering a new light 6 cylinder magneto for testing. | 2nd Mar 1920 | Box 35 \ 1 scan 203 | |
| Magnetos from the Fellows Magneto Company, specifically types E.M.6 and E.S.6, and the inability to conduct bench tests. | 15th Mar 1920 | Box 35 \ 1 scan 204 | |
| Inspection and testing of a sample Fellows Magneto. | 1st Mar 1920 | Box 35 \ 1 scan 205 | |
| Testing of a new magneto from the Fellows Magneto Co. | 18th Mar 1920 | Box 35 \ 1 scan 206 | |
| Letter to The Fellows Magneto Co. Ltd. requesting the later E.S.6 magneto model for testing. | 23th Mar 1920 | Box 35 \ 1 scan 207 | |
| Sales letter from a magneto manufacturer offering an agency, their products, and repair services. | 3rd Mar 1920 | Box 35 \ 1 scan 208 | |
| Letter from Fellows Magneto Company regarding the forwarding of an E.S.6 Magneto for examination and test purposes. | 25th Mar 1920 | Box 35 \ 1 scan 209 | |
| Price and illustration list for British-made magnetos from the Fellows Magneto Co., Ltd. | 24th Mar 1920 | Box 35 \ 1 scan 210 | |
| Catalogue page for FMC magnetos and spare part cases for light car, large car, and cycle engines. | 1st Apr 1920 | Box 35 \ 1 scan 211 | |
| Internal memorandum regarding the loan of two types of Fellows Magnetos. | 1st Apr 1920 | Box 35 \ 1 scan 212 | |
| Instructing the return of an E.M.6 Fellows Magneto to the Fellows Magneto Company. | 11th Sep 1920 | Box 35 \ 1 scan 213 | |
| Letter to Fellows Magneto Co. regarding the return of an untested E.M.6 Magneto. | 1st Sep 1920 | Box 35 \ 1 scan 214 | |
| Letter from Fellows Magneto Company Limited regarding their exhibit at the 1920 Motor Show. | 3rd Nov 1920 | Box 35 \ 1 scan 215 | |
| Continuation of a letter from Fellows Magneto Company Ltd inviting a meeting at a motor show. | 17th Nov 1920 | Box 35 \ 1 scan 216 | |
| Letter from Fellows Magneto Co. Ltd. enclosing illustrated particulars of their factory and offering further copies. | 17th Nov 1920 | Box 35 \ 1 scan 217 | |
| Blueprints for a Fellows Type E.M.G. Magneto on a 40/50 Engine for Chassis 112-AG. | 26th Apr 1921 | Box 35 \ 1 scan 218 | |
| Sales letter from Fellows Magneto Company Limited regarding particulars of their magneto machines for the upcoming season. | 2nd Dec 1924 | Box 35 \ 1 scan 219 | |
| Article from 'The Autocar' magazine detailing the process and experiences of applying an aluminium finish to a car. | 4th Mar 1911 | Box 35 \ 2 scan 001 | |
| To Mr. Johnson concerning the composition and use of Aluminium Alloy in vehicles. | 5th Oct 1911 | Box 35 \ 2 scan 002 | |
| Newspaper clipping detailing a method for soldering aluminium using a special flux and solder from Alu-sol Manufacturing Co. | 15th Oct 1912 | Box 35 \ 2 scan 003 | |
| Article from 'The Autocar' discussing the composition and analysis of aluminium pistons. | 28th Nov 1914 | Box 35 \ 2 scan 004 | |
| To Mr. Royce suggesting the adoption of aluminium pistons, citing W.O. Bentley's successful use of them. | 8th Jul 1915 | Box 35 \ 2 scan 005 | |
| Benefits of aluminium pistons and suggesting they be trialled. | 8th Jul 1915 | Box 35 \ 2 scan 006 | |
| Urgent adoption of aluminium pistons for a 12-cylinder aero engine, comparing three potential designs. | 14th Aug 1915 | Box 35 \ 2 scan 007 | |
| Engine knocking issues and theorising that cold weather expansion of a single aluminium piston could cause major failures. | 25th Nov 1915 | Box 35 \ 2 scan 008 | |
| Broken connecting rod, proposing an experiment with a larger piston to investigate the cause. | 28th Jan 1916 | Box 35 \ 2 scan 009 | |
| Change in piston design to a three-ring arrangement for Eagle, Falcon, and Hawk engines. | 28th Jan 1916 | Box 35 \ 2 scan 010 | |
| Overheating and detonation issues caused by a new lightened piston design. | 29th May 1916 | Box 35 \ 2 scan 011 | |
| Engine overheating issues in Australia, requesting piston rings and discussing potential solutions. | 18th Mar 1916 | Box 35 \ 2 scan 012 | |
| From BY to EH regarding the proposed clearances for a new aluminium piston for cars. | 2nd Aug 1916 | Box 35 \ 2 scan 013 | |
| Drawing of an aluminium piston for a standard chassis, with tables for suggested clearances. | 2nd Aug 1916 | Box 35 \ 2 scan 014 | |
| Performance of various aluminium pistons and delaying standardisation until new designs are tested and approved. | 15th May 1916 | Box 35 \ 2 scan 015 | |
| Fitting, testing, and subsequent adjustment of aluminium pistons in a car engine. | 15th May 1916 | Box 35 \ 2 scan 016 | |
| Cylinder re-grinding, piston fitting, clearance measurements, and engine performance tests. | 16th Feb 1916 | Box 35 \ 2 scan 017 | |
| Engine performance after fitting new pistons, comparing horsepower, compression, and piston knock. | 15th Mar 1916 | Box 35 \ 2 scan 018 | |
| Specification sheet for different types of multi-ringed pistons for aero and chassis applications. | 31th Jul 1917 | Box 35 \ 2 scan 019 | |
| Extract discussing Mr. Royce's insistence on using aluminium pistons and the engineering concerns regarding potential piston knock. | 7th Oct 1918 | Box 35 \ 2 scan 020 | |
| Unsatisfactory performance of Zephyr type pistons and the issue of piston knocks for an after-the-war chassis. | 22th Oct 1918 | Box 35 \ 2 scan 021 | |
| Fitting Truffault-style shock absorbers to the After-the-war-chassis. | 26th Apr 1917 | Box 35 \ 2 scan 022 | |
| Design of a die-cast piston for the X.3400 chassis. | 1st Nov 1920 | Box 35 \ 2 scan 023 | |
| Technical memo detailing the specifications for new experimental pistons and connecting rods for testing on chassis 7-CA. | 1st Nov 1920 | Box 35 \ 2 scan 024 | |
| Transmittal note for a copy of document LEC. 1016 regarding a Die Cast Chassis Piston. | 29th Oct 1918 | Box 35 \ 2 scan 025 | |
| Cross-section design drawing for a die-cast chassis piston with annotations. | 26th Apr 1933 | Box 35 \ 2 scan 026 | |
| Cover sheet with stamps indicating receipt by the print room and another department. | 29th Oct 1917 | Box 35 \ 2 scan 027 | |
| Modifications to the aluminium piston design to address piston knocks. | 31th Oct 1918 | Box 35 \ 2 scan 028 | |
| Continuation of a document outlining the advantages of a new piston design. | 14th Nov 1918 | Box 35 \ 2 scan 029 | |
| Experiences with fitting aluminium and Zephyr pistons, including issues with clearances, piston knock, and performance over mileage. | 14th Nov 1918 | Box 35 \ 2 scan 030 | |
| Extract detailing the testing of new aluminium pistons for the 40/50 HP chassis. | 26th Nov 1918 | Box 35 \ 2 scan 031 | |
| Extract discussing the production strategy for pistons and connecting rods on the 45/50 HP chassis. | 29th Nov 1918 | Box 35 \ 2 scan 032 | |
| The fit of the gudgeon pin in the piston for a standard chassis. | 3rd Dec 1918 | Box 35 \ 2 scan 033 | |
| Instruction to test a die-cast aluminium piston with both poor and good fit piston pins. | 5th Dec 1918 | Box 35 \ 2 scan 034 | |
| Notes from a meeting with Mr. Royce discussing design changes to various engine and chassis components. | 16th Dec 1918 | Box 35 \ 2 scan 035 | |
| Cancelling instructions for a pre-war chassis piston and urging a report on an experimental aluminium piston. | 20th Dec 1918 | Box 35 \ 2 scan 036 | |
| Potential causes and solutions for piston knocks, including lubricants, ignition timing, and piston design. | 25th Aug 1919 | Box 35 \ 2 scan 037 | |
| Extract detailing alterations to the 500 40/50 chassis regarding aluminium pistons. | 17th Dec 1918 | Box 35 \ 2 scan 038 | |
| Extract detailing alterations to the 500 40/50 Chassis, specifically the positioning of piston rings. | 17th Dec 1918 | Box 35 \ 2 scan 039 | |
| Instruction to test a die-cast aluminium piston with a specified gudgeon pin slack. | 2nd Jan 1919 | Box 35 \ 2 scan 040 | |
| Alterations to be made to the 40/50 HP chassis. | 8th Jan 1919 | Box 35 \ 2 scan 041 | |
| Index of alterations for the 40-50 HP present type chassis. | 18th Dec 1918 | Box 35 \ 2 scan 042 | |
| Piston design policy, including proposed tests for various new aluminium piston types. | 18th Dec 1918 | Box 35 \ 2 scan 043 | |
| Parts for testing a new piston design for a standard chassis. | 16th Jan 1919 | Box 35 \ 2 scan 044 | |
| Progress of fitting experimental pistons to a shop car. | 16th Jan 1919 | Box 35 \ 2 scan 045 | |
| The shortening of a chassis connecting rod by machining a new one. | 20th Jan 1919 | Box 35 \ 2 scan 046 | |
| Comparative tests on aluminium pistons and short connecting rods following a reduction in the Eagle engine program. | 20th Jan 1919 | Box 35 \ 2 scan 047 | |
| The design of short connecting rods for the 40/50 chassis, comparing white metal bearings to brasses for ease of repair. | 26th Apr 1917 | Box 35 \ 2 scan 048 | |
| Issues with white metal on aero engines and the comparative benefits of using brass bushes. | 26th Apr 1917 | Box 35 \ 2 scan 049 | |
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