| Description | Date | Identifier | |
| Letter from The S.U. Company regarding a query about needle seatings. | 30th Mar 1935 | Box 31 \ 5 Scan314 | |
| Testing and evaluation of Gabriel Snubbers from a 12-cylinder Packard car. | 8th Nov 1920 | Box 32 \ 1 Scan001 | |
| Sales letter from Brown Brothers Ltd. promoting the 'Gabriel' Rebound Snubber. | 9th Apr 1921 | Box 32 \ 1 Scan002 | |
| Advertisement for the Gabriel Rebound Snubber, detailing its function, benefits, and pricing. | 9th Apr 1921 | Box 32 \ 1 Scan003 | |
| Advertisement leaflet for the Gabriel Rebound Snubber shock absorber, from Brown Brothers Ltd. | 8th Jun 1921 | Box 32 \ 1 Scan004 | |
| Extract regarding complaints of knocking in the transmission, its causes related to leaf springs and road conditions, and a suggestion to fit shock dampers. | 8th Jun 1921 | Box 32 \ 1 Scan005 | |
| Continued memo discussing transmission knock due to uneven engine firing and suggesting a solution for future cars. | 8th Jun 1921 | Box 32 \ 1 Scan006 | |
| Springfield complaints about the policy of fitting shock absorbers. | 8th Jun 1921 | Box 32 \ 1 Scan007 | |
| Springfield complaints and Mr. Royce's recommendations for suspension damping. | 16th Jun 1921 | Box 32 \ 1 Scan008 | |
| Complaints about poor ride quality in Springfield cars and the recommendation to fit shock dampers. | 28th Jun 1921 | Box 32 \ 1 Scan009 | |
| Objections to Hartford shock absorbers for the 40/50 chassis and advocating for a higher quality, progressive type to maintain the company's reputation. | 9th Dec 1921 | Box 32 \ 1 Scan010 | |
| Article from 'The Autocar' magazine by Professor W. Morgan on the essentials of practical fuel comparisons for engines. | 28th Jan 1911 | Box 32 \ 1 Scan011 | |
| Article by Professor W. Morgan about the essentials of practically comparing and testing different fuels for engines. | 28th Jan 1911 | Box 32 \ 1 Scan012 | |
| Article from 'THE AUTOCAR' discussing the causes of high petrol prices and suggesting solutions such as co-operative distribution and the use of alternative fuels. | 3rd Aug 1912 | Box 32 \ 1 Scan013 | |
| Formula for determining the cost-effectiveness of fuel based on calorific value and price. | 8th Aug 1918 | Box 32 \ 1 Scan014 | |
| Journal page discussing the formation of the Petrol Substitutes Committee and the cancellation of the Isle of Man race, with handwritten notes on 'Synthetic Petrol'. | 8th Mar 1912 | Box 32 \ 1 Scan015 | |
| Article discussing the fuel problem, including the potential of synthetic petrol and the changing nature of fuel supply and quality. | 8th Mar 1913 | Box 32 \ 1 Scan016 | |
| Key-map illustrating the principal sources and shipping routes of petrol to England. | 8th Mar 1913 | Box 32 \ 1 Scan017 | |
| Article from 'The Auto' journal discussing global oilfields and the supply of petrol for motorists in 1913. | 8th Mar 1913 | Box 32 \ 1 Scan018 | |
| Article on the global fuel problem, discussing petrol consumption, world supply figures, market dynamics, and pricing. | 15th Mar 1913 | Box 32 \ 1 Scan019 | |
| Article discussing the cost and viability of benzol and alcohol as substitutes for petrol. | 22th Mar 1913 | Box 32 \ 1 Scan020 | |
| Comparison of benzol and petrol distillation curves, and an analysis of alcohol as a potential substitute fuel. | 22th Mar 1913 | Box 32 \ 1 Scan021 | |
| Article discussing the processes of converting heavy crude oil into petrol, including distillation and cracking. | 8th Mar 1913 | Box 32 \ 1 Scan022 | |
| Article from 'THE AUTOCAR' discussing the fuel question, including petrol statistics, production methods, and potential alternatives. | 25th Oct 1913 | Box 32 \ 1 Scan023 | |
| Article from 'The Autocar' discussing the fuel question, focusing on benzole and other petrol alternatives. | 25th Oct 1913 | Box 32 \ 1 Scan024 | |
| The possibilities of alcohol as a fuel. | 8th Nov 1913 | Box 32 \ 1 Scan025 | |
| Article from 'The Autocar' discussing the potential of alcohol as an alternative motor fuel to petrol. | 8th Nov 1913 | Box 32 \ 1 Scan026 | |
| Article from 'The Autocar' magazine discussing the possibilities of alcohol as an automotive fuel, comparing it to petrol and benzole, and detailing horsepower tests. | 8th Nov 1913 | Box 32 \ 1 Scan027 | |
| Report comparing the performance and consumption of petrol, benzole, and alcohol-based fuel mixtures. | 8th Nov 1913 | Box 32 \ 1 Scan028 | |
| Article clipping from 'The Autocar' discussing the possibilities of using alcohol as a fuel for engines. | 8th Nov 1913 | Box 32 \ 1 Scan029 | |
| Reply to criticisms on the use of alcohol as a motor fuel, focusing on issues of corrosion and flame propagation. | 8th Nov 1913 | Box 32 \ 1 Scan030 | |
| Article from 'THE AUTOCAR' discussing the 'Fuel Question' and the viability of alternative motor fuels like alcohol and benzole. | 8th Nov 1913 | Box 32 \ 1 Scan031 | |
| Article from 'The Autocar' summarizing Professor Vivian Lewes's lectures on motor fuels, including petrol, benzole, and alcohol. | 6th Mar 1915 | Box 32 \ 1 Scan032 | |
| Internal memorandum regarding the testing of motor spirit from London Lubricant Ltd. | 25th Nov 1913 | Box 32 \ 1 Scan033 | |
| Page 2 of a memorandum outlining four key questions for an engine test comparing different fuels. | 30th Oct 1913 | Box 32 \ 1 Scan034 | |
| Requesting tests on a new motor spirit to evaluate its economy and performance. | 28th Nov 1913 | Box 32 \ 1 Scan035 | |
| The poor quality of a motor spirit sample from London Lubricants Ltd. used for engine testing. | 18th Feb 1914 | Box 32 \ 1 Scan036 | |
| Technical article from 'The Motor Trader' magazine comparing paraffin and petrol as fuel, detailing various vaporizers and starting systems. | 12th Jul 1916 | Box 32 \ 1 Scan037 | |
| Extract from 'the Auto' magazine discussing a vaporiser embodying correct principles, developed by Mr. John Good. | 3rd Oct 1916 | Box 32 \ 1 Scan038 | |
| Description of pressure and velocity changes in an enlarging cone to promote vaporisation. | 3rd Oct 1916 | Box 32 \ 1 Scan039 | |
| Experiments with petrol substitutes, detailing poor engine performance and potential carburetter modifications. | 17th Oct 1916 | Box 32 \ 1 Scan040 | |
| Engine performance issues related to fuel mixture, ignition, and carburettor settings. | 16th Feb 1915 | Box 32 \ 1 Scan041 | |
| Fuel experiments and suggestions for improving fuel distribution via carburetter and induction pipe adjustments. | 16th Feb 1915 | Box 32 \ 1 Scan042 | |
| Chart showing the volatility curves for various motor fuels. | 27th Mar 1917 | Box 32 \ 1 Scan043 | |
| Letter to Count Carlos de Salamanca in Madrid regarding fuel substitutes for an engine. | 29th Jan 1918 | Box 32 \ 1 Scan044 | |
| Letter discussing engine lubrication, oil acidity testing during trials with unknown fuels, and instructions for taking oil samples. | 29th Jan 1918 | Box 32 \ 1 Scan045 | |
| Forwarding a copy of Mr Cowen's memo concerning chassis work and fuel availability. | 30th Oct 1918 | Box 32 \ 1 Scan046 | |
| Horsepower, consumption, and vaporisation tests of Shell Aviation Spirit 'B'. | 5th Apr 1919 | Box 32 \ 1 Scan047 | |
| Fuel testing, comparing Shell Aviation B with benzol and petrol mixtures for detonation and pre-ignition. | 28th Apr 1917 | Box 32 \ 1 Scan048 | |
| Recommendation for a specific fuel mixture to be used for Atlantic flights to reduce the risk of pre-ignition. | 5th Apr 1919 | Box 32 \ 1 Scan049 | |
| Test report on Shell Aviation Spirit 'B', detailing horsepower, consumption, and vaporisation tests. | 5th Apr 1919 | Box 32 \ 1 Scan050 | |
| Fuel tests comparing Shell Aviation B against standard petrol and benzol mixtures for engine detonation, condensation, and pre-ignition. | 5th Apr 1919 | Box 32 \ 1 Scan051 | |
| Recommendation to use Shell Aviation Spirit B with an addition of 12.5% benzol for Atlantic Flights to reduce the risk of pre-ignition. | 23th Oct 1920 | Box 32 \ 1 Scan052 | |
| Specific gravity of petrol in relation to engine detonation and vaporization tests. | 23th Oct 1920 | Box 32 \ 1 Scan053 | |
| Comparison of vaporization percentages for two samples at various temperatures for a specific gravity of 730. | 23th Oct 1920 | Box 32 \ 1 Scan054 | |
| Invitation from Shell-Mex Ltd. to an address on motor fuel efficiency. | 18th Nov 1921 | Box 32 \ 1 Scan055 | |
| Reply slip for an invitation to Mr. Kewley's lecture and dinner. | 18th Nov 1921 | Box 32 \ 1 Scan056 | |
| Postcard addressed to Messrs. Shell-Mex, Ltd. in Birmingham. | 9th Jan 1922 | Box 32 \ 1 Scan057 | |
| Sample of a 'fuel saver' or 'fuel economiser' device for a car. | 9th Jan 1922 | Box 32 \ 1 Scan058 | |
| Proposed modifications to a WO-II chassis, accompanied by a handwritten list of parts and tasks. | 11th May 1922 | Box 32 \ 1 Scan059 | |
| Recommendation for a fuel mixture of half Benzole and half petrol for demonstration purposes. | 28th Jul 1922 | Box 32 \ 1 Scan060 | |
| Tests of various samples of petrol, detailing their properties and performance characteristics. | 9th Oct 1922 | Box 32 \ 1 Scan061 | |
| Performance analysis of various motor spirits and benzols. | 9th Oct 1922 | Box 32 \ 1 Scan062 | |
| The urgent testing of a new motor fuel for Lord Wargrave. | 26th Apr 1923 | Box 32 \ 1 Scan063 | |
| Testing of a new motor fuel. | 2nd May 1923 | Box 32 \ 1 Scan064 | |
| Chasing a delayed report on a new motor fuel and expressing concern about the capacity of the Derby works. | 2nd May 1923 | Box 32 \ 1 Scan065 | |
| Letter to The Oil Supply Corporation Ltd. requesting a sample of their new fuel for testing purposes. | 3rd May 1923 | Box 32 \ 1 Scan066 | |
| Telegram arranging a fuel test, confirming the date, arrival time, and delivery of oil. | 23th May 1923 | Box 32 \ 1 Scan067 | |
| Letter from the Oil Supply Corporation Ltd. confirming the arrival of Mr. Critchley and Mr. Lincoln in Derby. | 7th May 1923 | Box 32 \ 1 Scan068 | |
| Letter from Oil Supply Corporation Ltd. regarding arrangements for a 'PYNOL' fuel test, for the attention of Mr. Hives. | 8th May 1923 | Box 32 \ 1 Scan069 | |
| Letter to The Oil Supply Cor. Ltd. arranging a car for fuel testing. | 10th May 1923 | Box 32 \ 1 Scan070 | |
| Test report for car 49 G.B. using a Pyrol mixture, detailing performance under various conditions. | 11th May 1923 | Box 32 \ 1 Scan071 | |
| Fuel consumption and detonation tests comparing a fuel named Pynol against Petrol. | 11th May 1923 | Box 32 \ 1 Scan072 | |
| Report comparing vehicle performance and acceleration times using Petrol versus Pyrol fuel. | 11th May 1923 | Box 32 \ 1 Scan073 | |
| Laboratory report detailing the distillation and analysis of a petrol sample. | 11th May 1923 | Box 32 \ 1 Scan074 | |
| Instructions to Stores to return two empty 5-gallon drums used for special fuel testing to the Oil Supply Corporation Ltd. | 14th May 1923 | Box 32 \ 1 Scan075 | |
| Letter to the Oil Supply Corporation regarding fuel testing and a potential fuel source from United Dairies. | 14th May 1923 | Box 32 \ 1 Scan076 | |
| Letter from the Oil Supply Corporation Ltd. detailing comparative bench test results for PYNOL and PETROL fuels. | 15th May 1923 | Box 32 \ 1 Scan077 | |
| Letter from the Oil Supply Corporation regarding test results and supply of a fuel named 'PYNOL'. | 15th May 1923 | Box 32 \ 1 Scan078 | |
| Fuel consumption and performance test report comparing Pyrol and Petrol fuels on car 49 GB. | 15th May 1923 | Box 32 \ 1 Scan079 | |
| The testing and characteristics of 'Pynol' fuel. | 16th May 1923 | Box 32 \ 1 Scan080 | |
| The performance comparison of 'Pynol' fuel against standard petrol. | 15th May 1923 | Box 32 \ 1 Scan081 | |
| Bench test results comparing Petrol and 'Pynol' fuel on a Goshawk engine. | 15th May 1923 | Box 32 \ 1 Scan082 | |
| Road tests comparing 'Pynol' motor fuel with Petrol. | 15th May 1923 | Box 32 \ 1 Scan083 | |
| Hill climbing performance comparison between Petrol and Pynol fuels. | 15th May 1923 | Box 32 \ 1 Scan084 | |
| Graph comparing the horsepower and fuel consumption of Petrol versus Pynol for a Goshawk engine. | 15th May 1923 | Box 32 \ 1 Scan085 | |
| Stamped by the Print Room in Derby. | 17th May 1923 | Box 32 \ 1 Scan086 | |
| Graph of fuel tests showing the distillation curves and chemical analysis for Pynol and Shell No 1. | 17th May 1923 | Box 32 \ 1 Scan087 | |
| Reverse side of a document with a handwritten number and a date stamp. | 17th May 1923 | Box 32 \ 1 Scan088 | |
| The performance of Pynol fuel compared to petrol, outlining necessary engine modifications for its use. | 15th May 1929 | Box 32 \ 1 Scan089 | |
| From B.J. to Hs. discussing the confidentiality of a report on 'Pynol' fuel and whether to share it. | 19th May 1923 | Box 32 \ 1 Scan090 | |
| Covering letter forwarding correspondence from the R.A.C. regarding alcohol in petrol. | 1st Jun 1923 | Box 32 \ 1 Scan091 | |
| Copy of a letter from the Royal Automobile Club regarding the quality of petrol available in France due to laws on alcohol mixing. | 29th May 1923 | Box 32 \ 1 Scan092 | |
| Request to keep petrol storage tanks and bins constantly filled to the utmost capacity. | 26th Jun 1923 | Box 32 \ 1 Scan093 | |
| The performance differences of a 20 HP car using various brands of petrol. | 26th Oct 1923 | Box 32 \ 1 Scan094 | |
| Comparative tests on different grades of petrol to determine loading up during low-speed, full-throttle work. | 25th Oct 1923 | Box 32 \ 1 Scan095 | |
| Comparing the performance of 20 HP cars using various brands of petrol. | 25th Oct 1923 | Box 32 \ 1 Scan096 | |
| Covering memo for a report on an Anglo-America Petroleum Spirit sample, discussing test options and a further attachment. | 1st Jan 1924 | Box 32 \ 1 Scan097 | |
| Laboratory analysis report for a sample of Anglo-American Petroleum Spirit, detailing distillation results and chemical composition. | 17th Dec 1923 | Box 32 \ 1 Scan098 | |
| Laboratory report detailing the distillation test and chemical analysis of a Shell Aviation Motor Spirit sample. | 7th Apr 1923 | Box 32 \ 1 Scan099 | |
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