| Description | Date | Identifier | |
| Sending a model of the latest Bentley dashboard noise insulation scheme. | 8th May 1936 | Box 138 \ 1 scan0264 | |
| Request to The Ruberoid Company for a sample of Indented Anti-drum Felt for experimental purposes. | 27th May 1936 | Box 138 \ 1 scan0265 | |
| Letter from Siemens-Schuckert arranging a demonstration of a traffic noise meter. | 4th Jun 1936 | Box 138 \ 1 scan0266 | |
| Noise transmitted by the thermometer on the Phantom III chassis and the need for an isolation scheme. | 9th Jun 1936 | Box 138 \ 1 scan0267 | |
| Schemes tested to prevent noise transmission through the dashboard thermometer. | 13th Jun 1936 | Box 138 \ 1 scan0268 | |
| Report comparing two design schemes for a thermometer bulb gland packing, addressing water leaks and binding issues. | 13th Jun 1936 | Box 138 \ 1 scan0269 | |
| Letter from Servais Silencers Limited proposing a new silencer for motor cars. | 9th Jul 1936 | Box 138 \ 1 scan0270 | |
| Brochure cover with an illustration advocating for silence amidst street traffic. | 9th Jul 1936 | Box 138 \ 1 scan0271 | |
| Advertising leaflet for the 'Servais Straight-Through All-British Silencer'. | 23th Jun 1936 | Box 138 \ 1 scan0272 | |
| Test report comparing the performance of three different exhaust silencers on a 3.5-litre engine. | 23th Jun 1936 | Box 138 \ 1 scan0273 | |
| Letter to The Servais Services Ltd. requesting a sample of sound-absorbing material for testing. | 15th Jul 1936 | Box 138 \ 1 scan0274 | |
| Letter to The Ruberoid Co. Ltd. acknowledging receipt of a sample of Bolkoid Anti-Drum felt for testing. | 7th Aug 1936 | Box 138 \ 1 scan0275 | |
| Follow-up letter to Servais Services Ltd. requesting a sample of silencer sound absorbing material. | 7th Aug 1936 | Box 138 \ 1 scan0276 | |
| Letter from Servais Silencers regarding the construction of their silencer using expanded metal, steel wool, and asbestos. | 11th Aug 1936 | Box 138 \ 1 scan0277 | |
| Criticizing the finish and fitting of a Seapak and carpet on a trials car dashboard. | 9th Sep 1936 | Box 138 \ 1 scan0278 | |
| Noise insulation recommendations for Phantom III 25/30 and Bentley models for coachbuilders. | 2nd Mar 1937 | Box 138 \ 1 scan0279 | |
| Preparing a write-up and revised blueprint for coachbuilders on noise insulation for the Phantom III, 25/30, and Bentley models. | 3rd Mar 1937 | Box 138 \ 1 scan0280 | |
| Requesting feedback on draft recommendations for sound insulation provided to coachbuilders. | 6th Apr 1937 | Box 138 \ 1 scan0281 | |
| Testing of sample sound insulation material on Bentley and 25/30 HP cars. | 7th Apr 1937 | Box 138 \ 1 scan0282 | |
| Letter from the Experimental Dept. to Sound Proofing Ltd. to arrange a visit to discuss noise elimination in car bodies. | 1st Jun 1937 | Box 138 \ 1 scan0283 | |
| The cost versus benefit of a modified sound insulation scheme for Bentley and 25/30 HP cars. | 4th Jun 1937 | Box 138 \ 1 scan0284 | |
| Secret memo discussing experiments to reduce noise in Wraith bodies. | 18th Jun 1937 | Box 138 \ 1 scan0285 | |
| Secret memo discussing alterations to Wraith bodies to address noise issues. | 21th Jun 1937 | Box 138 \ 1 scan0286 | |
| Requesting a list of points for coachbuilders to observe to reduce wind noises in all cars. | 25th Jan 1938 | Box 138 \ 1 scan0287 | |
| Methods for reducing wind noise from doors and sunshine roofs on all car models. | 28th Jan 1938 | Box 138 \ 1 scan0288 | |
| Improvements for wind noise, referencing sketches for roof treatment and door flanges. | 28th Jan 1938 | Box 138 \ 1 scan0289 | |
| Blueprint showing a cross-section of a car door with details of the rubber sealing strips. | 28th Jan 1938 | Box 138 \ 1 scan0290 | |
| Cross-section diagram showing the side edge and sealing of a sunshine roof on a Bentley. | 28th Jan 1938 | Box 138 \ 1 scan0291 | |
| Requesting action to ensure recommendations on wind noise reduction are consistently implemented by coachbuilders and testers. | 28th Jan 1938 | Box 138 \ 1 scan0292 | |
| Circulating recommendations on wind noises to coachbuilders and internal staff. | 7th Feb 1938 | Box 138 \ 1 scan0293 | |
| Cover note accompanying copies of a sunshine roof treatment and a door sketch. | 18th Feb 1938 | Box 138 \ 1 scan0294 | |
| Various sound insulation materials used by coachbuilder Van Voorens and their application on a Bentley body. | 5th Mar 1938 | Box 138 \ 1 scan0295 | |
| Specifications for the application of sound-deadening and insulating materials to various car body components. | 5th Mar 1938 | Box 138 \ 1 scan0296 | |
| Brochure cover for a vibration study using the Neobeam Oscilloscope. | 8th Mar 1938 | Box 138 \ 1 scan0297 | |
| Catalogue page for vibration and sound analysis equipment, including oscilloscopes, microphones, and speakers. | 30th Jun 1938 | Box 138 \ 1 scan0298 | |
| Guide on using oscilloscopes and pickups for measuring material smoothness, noise levels, magnetic fields, and vibrations. | 30th Jun 1938 | Box 138 \ 1 scan0299 | |
| Instructions and applications for the Neobeam Oscilloscope and associated vibration pickup equipment for analysis. | 8th Jun 1938 | Box 138 \ 1 scan0300 | |
| Letter from the Experimental Department requesting a trial sample of Vi-prou sound insulating felt. | 8th Jun 1938 | Box 138 \ 1 scan0301 | |
| Letter from Marconi-Ekco Instruments regarding noise measuring equipment for motor vehicles. | 10th Jun 1938 | Box 138 \ 1 scan0302 | |
| Letter from Marconi-Ekco Instruments detailing prices and specifications for noise and vibration analysis instruments. | 10th Jun 1938 | Box 138 \ 1 scan0303 | |
| Product specification sheet for a Wave Analyser, Type TF.455, from Marconi-Ekco Instruments Ltd. | 1st Jun 1938 | Box 138 \ 1 scan0304 | |
| Specification document detailing the design and features of a Wave Analyser. | 1st Jun 1938 | Box 138 \ 1 scan0305 | |
| Specification sheet for a Wave Analyser, Type TF.455. | 1st Jan 1938 | Box 138 \ 1 scan0306 | |
| Product specification sheet for an Adjustable Tuning Unit, Type TF456. | 1st Jan 1938 | Box 138 \ 1 scan0307 | |
| Specification sheet for an Adjustable Tuning Unit. | 1st Apr 1938 | Box 138 \ 1 scan0308 | |
| Specification sheet and brochure for Marconi-Ekco noise and vibration measurement equipment. | 1st Apr 1938 | Box 138 \ 1 scan0309 | |
| Technical specification sheet for the Noise Meter Type TF500 and its accessories. | 17th Aug 1938 | Box 138 \ 1 scan0310 | |
| Transfer of personnel to focus on vibration and stress measurement research for the Car Division. | 17th Aug 1938 | Box 138 \ 1 scan0311 | |
| Organization of a section for noise and vibration measurement on the chassis. | 18th Jun 1938 | Box 138 \ 1 scan0312 | |
| Establishing a project section for the measurement of vibration. | 22th Aug 1938 | Box 138 \ 1 scan0313 | |
| Requesting a report on a sample of Anglex Cork & Rubber Insulating Material. | 5th Jan 1939 | Box 138 \ 1 scan0314 | |
| Testing and rejection of anglex cork and rubber material. | 20th Jan 1939 | Box 138 \ 1 scan0315 | |
| Noise insulation solutions for the B.5 series Bentley. | 27th Jan 1939 | Box 138 \ 1 scan0316 | |
| Specification for an instrument to record car wheel revolutions against a time scale. | 12th Feb 1924 | Box 138 \ 2 scan0001 | |
| Hand-drawn sketch and description of a recording instrument. | 13th Feb 1924 | Box 138 \ 2 scan0002 | |
| Letter from The Cambridge and Paul Instrument Company, Limited, acknowledging receipt of an enquiry. | 13th Feb 1924 | Box 138 \ 2 scan0003 | |
| Letter from The Cambridge and Paul Instrument Company regarding a laboratory 3-pen chronograph as a space-time recorder. | 22th Feb 1924 | Box 138 \ 2 scan0004 | |
| Inquiry to Cambridge Scientific Instrument Co. about the suitability of their chronograph for road tests. | 23th Feb 1924 | Box 138 \ 2 scan0005 | |
| Letter from The Cambridge and Paul Instrument Company regarding the supply and testing of a chronograph. | 25th Feb 1924 | Box 138 \ 2 scan0006 | |
| Continuation letter from The Cambridge and Paul Instrument Company discussing instrument practicalities like ink drying and electro-magnetic lag. | 27th Feb 1924 | Box 138 \ 2 scan0007 | |
| Letter to The Cambridge Scientific Instr. Co. discussing specifications for a chronograph with an electric motor and paper record strip. | 27th Feb 1924 | Box 138 \ 2 scan0008 | |
| Letter responding to an inquiry about a chronograph, advising against using absorbent paper due to inaccuracy and potential for clogging. | 28th Feb 1924 | Box 138 \ 2 scan0009 | |
| Letter to The Cambridge Scientific Instr Co. regarding the type of paper for a recording strip instrument. | 29th Feb 1924 | Box 138 \ 2 scan0010 | |
| Internal request to order a Laboratory Chronograph from the Cambridge Scientific Instrument Co. | 29th Feb 1924 | Box 138 \ 2 scan0011 | |
| Works order request to purchase a Cambridge Laboratory Chronograph for braking and acceleration measurements. | 29th Feb 1924 | Box 138 \ 2 scan0012 | |
| Letter to Cambridge & Paul Intr:Co. clarifying details of a quotation for a Laboratory Chronograph. | 7th Mar 1924 | Box 138 \ 2 scan0013 | |
| Letter to The Cambridge Instrument Co. requesting expedition of two details before an order is placed. | 7th Mar 1924 | Box 138 \ 2 scan0014 | |
| Letter from The Cambridge and Paul Instrument Co. Ltd. clarifying charges and additions for a chronograph. | 10th Mar 1924 | Box 138 \ 2 scan0015 | |
| Letter from an instrument company clarifying the function of a three-pen chronograph. | 11th Mar 1924 | Box 138 \ 2 scan0016 | |
| Letter to Cambridge & Paul Instr: Co. Ltd. requesting a sketch for a Chronograph fitment. | 12th Mar 1924 | Box 138 \ 2 scan0017 | |
| Letter to Cambridge & Paul Instrument Co. Ltd. clarifying the capabilities of their chronograph for recording time intervals. | 12th Mar 1924 | Box 138 \ 2 scan0018 | |
| Letter from Cambridge and Paul Instrument Co. responding to an enquiry about a 3-pen Chronograph. | 13th Mar 1924 | Box 138 \ 2 scan0019 | |
| Concluding correspondence with the Cambridge Instrument Co. regarding a 3-pen chronograph and placing an order. | 14th Mar 1924 | Box 138 \ 2 scan0020 | |
| Photograph of a paper tape recording instrument or telegraph machine. | 18th Mar 1924 | Box 138 \ 2 scan0021 | |
| Letter from The Cambridge and Paul Instrument Company regarding a sketch for a Space-time Recorder. | 18th Mar 1924 | Box 138 \ 2 scan0022 | |
| Letter to Cambridge & Paul Instrument Co. Ltd. requesting details and delivery information for a space time recorder. | 1st May 1924 | Box 138 \ 2 scan0023 | |
| Space-Time Recorder, attaching correspondence with Cambridge & Paul Instrument Co. Ltd. | 7th May 1924 | Box 138 \ 2 scan0024 | |
| Letter chasing the completion of an order for a Chronograph instrument from The Cambridge & Paul Instr: Co. Ltd. | 17th May 1924 | Box 138 \ 2 scan0025 | |
| Letter from The Cambridge and Paul Instrument Company confirming the despatch of goods. | 19th May 1924 | Box 138 \ 2 scan0026 | |
| Letter to the Cambridge Instrument Co. with queries about a Chronograph's performance. | 22th May 1924 | Box 138 \ 2 scan0027 | |
| Letter from The Cambridge and Paul Instrument Company responding to queries about a Chronograph's performance. | 23th May 1924 | Box 138 \ 2 scan0028 | |
| Letter from the Cambridge and Paul Instrument Company regarding a specially designed contact breaker. | 6th Jun 1924 | Box 138 \ 2 scan0029 | |
| Letter to G. H. Hughes Ltd. requesting the forwarding of a completed small wheel and invoice to Mr. Hives. | 6th Jun 1924 | Box 138 \ 2 scan0030 | |
| Article from THE AUTOCAR magazine detailing how to build a simple electric timing set. | 28th Nov 1924 | Box 138 \ 2 scan0031 | |
| Page from 'The Autocar' magazine discussing an electric timing set and a new accumulator for lighting and starting. | 28th Nov 1924 | Box 138 \ 2 scan0032 | |
| Internal request to order two lengths of Spring Drive from The Cambridge Scientific Instrument Co. | 15th Jun 1925 | Box 138 \ 2 scan0033 | |
| High-speed steering wobbles. | 12th Jun 1925 | Box 138 \ 2 scan0034 | |
| Testing high-speed steering wobbles on Phantom and Silver Ghost chassis. | 12th Aug 1925 | Box 138 \ 2 scan0035 | |
| High-speed steering wobbles observed on cars fitted with balloon tyres. | 24th Aug 1925 | Box 138 \ 2 scan0036 | |
| Method for conducting car performance tests using a three-pen chronograph. | 25th Aug 1925 | Box 138 \ 2 scan0037 | |
| Page 2 of an experimental report detailing instrumentation for braking and high-speed tractive resistance tests. | 1st Aug 1925 | Box 138 \ 2 scan0038 | |
| Request to the Pattern Shop for a protective cover for a chronograph, including sketches. | 20th Jan 1926 | Box 138 \ 2 scan0039 | |
| Inquiry to the Cambridge Instrument Co. about modifying a 3-pen chronograph to use more pens on the same paper strip. | 26th Apr 1926 | Box 138 \ 2 scan0040 | |
| Letter from Cambridge Instrument Company regarding the exchange of a 3-pen chronograph for a 6-pen instrument. | 27th Apr 1926 | Box 138 \ 2 scan0041 | |
| Order of paper and ink for a 3-pen Chronograph from the Cambridge Scientific Instrument Co. | 29th Jun 1926 | Box 138 \ 2 scan0042 | |
| Difficulties experienced with contact accelerometers for suspension systems. | 1st Jul 1926 | Box 138 \ 2 scan0043 | |
| Accelerometer road testing discussing instrument modifications and correlating results with physical sensation. | 1st Jul 1926 | Box 138 \ 2 scan0044 | |
| Difficulty of measuring small differences in vehicle riding comfort and comparing test methods. | 1st Jul 1926 | Box 138 \ 2 scan0045 | |
| Request from The Cambridge Instrument Co. | 1st Jul 1926 | Box 138 \ 2 scan0046 | |
| Letter from Cambridge Instrument Co. Ltd. requesting to borrow records from a Laboratory Chronograph for a descriptive leaflet. | 19th Jul 1926 | Box 138 \ 2 scan0047 | |
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