| Description | Date | Identifier | |
| The setup and parameters for a temporary non-trembler ignition system on chassis 7 CA. | 10th Dec 1918 | Box 34 \ 1 Scan027 | |
| Technical discussion comparing different types of trembler and chassis coils for an ignition system. | 10th Dec 1918 | Box 34 \ 1 Scan028 | |
| The performance of a distributor arm and experiments with condensers for spark suppression. | 10th Dec 1918 | Box 34 \ 1 Scan029 | |
| Condenser design and the beneficial effects of adding a high tension wire to suppress flashing at the primary points. | 26th Apr 1917 | Box 34 \ 1 Scan030 | |
| Effects of adding a high-tension coil to an ignition system to reduce sparking. | 26th Apr 1917 | Box 34 \ 1 Scan031 | |
| Test data sheet for various ignition coils on a chassis ignition contact breaker. | 10th Dec 1918 | Box 34 \ 1 Scan032 | |
| Request to produce four small ignition condensers for experiments with specific dimensions. | 12th Dec 1918 | Box 34 \ 1 Scan033 | |
| Modifications to a non-trembler battery ignition system for a post-war chassis. | 13th Dec 1918 | Box 34 \ 1 Scan034 | |
| Technical note on updating the battery ignition system, including a suggestion from Mr. Royce. | 18th Dec 1918 | Box 34 \ 1 Scan035 | |
| Extract detailing the specified position of the distributing box on the dashboard. | 18th Dec 1918 | Box 34 \ 1 Scan036 | |
| Confirming modifications to the battery ignition system for chassis 49-GB. | 20th Dec 1918 | Box 34 \ 1 Scan037 | |
| Modifying instructions for the production of condensers for battery ignition systems. | 3rd Jan 1919 | Box 34 \ 1 Scan038 | |
| Confirming the production of two condensers for battery ignition and instructions for two more. | 6th Jan 1919 | Box 34 \ 1 Scan039 | |
| Ordering mica plates and investigating their thickness to improve the capacity of condensers for battery ignition. | 8th Jan 1919 | Box 34 \ 1 Scan040 | |
| Expressing anxiety over the reliability of a single spark non-trembler ignition coil scheme. | 14th Jan 1919 | Box 34 \ 1 Scan041 | |
| Table listing the approximate capacities in microfarads of various experimental condensers. | 16th Jan 1919 | Box 34 \ 1 Scan042 | |
| The performance of ignition coils and contact breakers, detailing current consumption and mechanical operation. | 4th Feb 1919 | Box 34 \ 1 Scan043 | |
| Continued report on testing 'B' coil and ballast lamp configurations for a vehicle's electrical system. | 4th Feb 1919 | Box 34 \ 1 Scan044 | |
| Requesting a pattern and six castings be made for a Condenser Casing. | 18th Mar 1919 | Box 34 \ 1 Scan045 | |
| Drawings for Mica and Tinfoil plates and arranging for the manufacture of dies for a condenser. | 18th Mar 1919 | Box 34 \ 1 Scan046 | |
| Components for manufacturing five different condensers for battery ignition. | 18th Mar 1919 | Box 34 \ 1 Scan047 | |
| Internal memorandum regarding the design, drawings, and production of a condenser for battery ignition. | 1st Apr 1919 | Box 34 \ 1 Scan048 | |
| Technical memo discussing design updates for shock dampers, back axle, brakes, and ignition systems. | 1st May 1919 | Box 34 \ 1 Scan049 | |
| Obtaining quotations for 250 sets of condensers for the 40/50 HP chassis from an outside firm. | 13th May 1919 | Box 34 \ 1 Scan050 | |
| Handover of 'A' and 'E' type condensers for testing. | 14th May 1919 | Box 34 \ 1 Scan051 | |
| Urging the finalization of the chassis condenser's capacity without further delay. | 15th May 1919 | Box 34 \ 1 Scan052 | |
| Measured capacities of two battery ignition condensers and the required capacity for the standard condenser. | 16th Mar 1919 | Box 34 \ 1 Scan053 | |
| Clarifying the required capacity for a chassis battery ignition condenser. | 19th May 1919 | Box 34 \ 1 Scan054 | |
| Confirmation of a telegram from Royce to Barrington about ballast resistance and a condenser for the Forty Fifty model. | 20th May 1919 | Box 34 \ 1 Scan055 | |
| Confirmation of a telegram regarding an objection to a spiral spring connection for a condenser. | 29th May 1919 | Box 34 \ 1 Scan056 | |
| Telegram from Mr. Barrington to Mr. Royce concerning design changes and production issues for ballast resistance and condensers. | 16th Apr 1919 | Box 34 \ 1 Scan057 | |
| Telegram from Royce discussing the design of a condenser, ballast resistance, and distributor box. | 10th Apr 1919 | Box 34 \ 1 Scan058 | |
| Internal memorandum discussing production changes for condensers on the 40/50 HP chassis. | 23th May 1919 | Box 34 \ 1 Scan059 | |
| Continued memo discussing the incorporation of a new design instead of attempting to fix the original. | 23th May 1919 | Box 34 \ 1 Scan060 | |
| Material choices and issues like contact splashing for a condenser in a battery ignition system. | 27th May 1919 | Box 34 \ 1 Scan061 | |
| Report calculating the frequency of oscillations in a circuit with a condenser and a lamp. | 27th May 1919 | Box 34 \ 1 Scan062 | |
| Cancelling an order for 250 old-type condenser sets and instructing to proceed with a new design. | 28th May 1919 | Box 34 \ 1 Scan063 | |
| Progress on experimental condensers and vibrator regulators for the chassis electrical outfit. | 30th May 1919 | Box 34 \ 1 Scan064 | |
| Print of a condenser for the 40/50 H.P+ Chassis. | 4th Jun 1919 | Box 34 \ 1 Scan065 | |
| Requesting enquiries be made for an electrical instrument to measure condenser capacities. | 4th Jun 1919 | Box 34 \ 1 Scan066 | |
| Sourcing difficulties for electrical ignition condensers and vibratory regulators for dynamos. | 11th Jun 1919 | Box 34 \ 1 Scan067 | |
| Measurement of condenser capacities by Weston A.C. Milli-ammeter. | 30th Jun 1919 | Box 34 \ 1 Scan068 | |
| Continued list of test readings for various condensers, showing corrected readings, differences, and capacity. | 24th Jul 1919 | Box 34 \ 1 Scan069 | |
| Seven-step testing procedure for a condenser. | 24th Jul 1919 | Box 34 \ 1 Scan070 | |
| Failures in chassis type condensers due to cracks in mica plates and proposing ordering pre-cut plates for experimentation. | 28th Jul 1919 | Box 34 \ 1 Scan071 | |
| Testing procedures and reliability of condensers for chassis. | 28th Jul 1919 | Box 34 \ 1 Scan072 | |
| Supply of condensers and the repair of a broken ignition condenser for use as a standard. | 28th Jul 1919 | Box 34 \ 1 Scan073 | |
| Confirmation to order 1500 mica condenser plates and obtain magneto condensers for comparative testing. | 28th Jul 1919 | Box 34 \ 1 Scan074 | |
| Extract from a report detailing an electrical fault caused by a failed condenser on Chassis 1 EX. | 28th Jul 1919 | Box 34 \ 1 Scan075 | |
| Letter from The General Electric Co Ltd regarding enquiries for potential transformers. | 28th Jul 1919 | Box 34 \ 1 Scan076 | |
| The electrical requirements and testing for condensers supplied by G.E.C. | 1st Aug 1919 | Box 34 \ 1 Scan077 | |
| Letter to The General Electric Co. Ltd. outlining the testing requirements for condensers. | 1st Aug 1919 | Box 34 \ 1 Scan078 | |
| Progress report on the experimental construction and testing of condensers for battery ignition systems. | 1st Aug 1919 | Box 34 \ 1 Scan079 | |
| The testing of condensers and experimentation with different varnishes for insulation. | 1st Aug 1919 | Box 34 \ 1 Scan080 | |
| Continued page of a memorandum or report, being page 3. | 1st Aug 1919 | Box 34 \ 1 Scan081 | |
| Communicating special test requirements for condensers to the manufacturer, General Electric Company. | 5th Aug 1919 | Box 34 \ 1 Scan082 | |
| Instruction sheet detailing amperage readings for different types of condensers at 225 volts. | 5th Aug 1919 | Box 34 \ 1 Scan083 | |
| Instruction sheet with calculations for electrical capacitance values. | 7th Feb 1917 | Box 34 \ 1 Scan084 | |
| Test report for three condensers, including readings, calculations, and approval for fitting. | 5th Aug 1919 | Box 34 \ 1 Scan085 | |
| Instruction note to Mr Clark detailing the successful testing and capacitance values of two condensers marked D & E. | 6th Aug 1919 | Box 34 \ 1 Scan086 | |
| Advice note from The General Electric Co., Ltd. for a condenser sample. | 6th Aug 1919 | Box 34 \ 1 Scan087 | |
| Test report on a modified G.E.C. condenser which showed signs of failure under a 350-volt load. | 9th Apr 1919 | Box 34 \ 1 Scan088 | |
| Instruction sheet detailing an issue with plates not making good contact and a plan to test condensers. | 9th Apr 1919 | Box 34 \ 1 Scan089 | |
| Request for a report on a sample condenser required by the General Electric Co. before they can proceed with manufacture. | 11th Aug 1919 | Box 34 \ 1 Scan090 | |
| Letter from The General Electric Co Ltd regarding a sample condenser dispatched for testing. | 6th Aug 1919 | Box 34 \ 1 Scan091 | |
| The testing of a sample chassis ignition condenser from G.E.C. | 12th Aug 1919 | Box 34 \ 1 Scan092 | |
| Typed letter to The British Mica Co. Ltd. arranging an interview with their Mr. Hill. | 12th Aug 1919 | Box 34 \ 1 Scan093 | |
| Request for the return of 5 tested condensers, as they are urgently needed for production. | 12th Aug 1919 | Box 34 \ 1 Scan094 | |
| Order for 1500 mica condenser plates to drawing N.786. | 13th Aug 1919 | Box 34 \ 1 Scan095 | |
| Confirming five condensers have passed testing and are suitable for production chassis. | 13th Aug 1919 | Box 34 \ 1 Scan096 | |
| Testing and specifications of two new condensers. | 13th Aug 1919 | Box 34 \ 1 Scan097 | |
| Specification for condensers being made in the Experimental Department for production chassis. | 16th Aug 1919 | Box 34 \ 1 Scan098 | |
| Confirmation memo regarding three condensers that have passed tests and are suitable for production chassis. | 16th Aug 1919 | Box 34 \ 1 Scan099 | |
| The testing of two new condensers, noting their capacities and comparison to a G.E.C. model. | 18th Aug 1919 | Box 34 \ 1 Scan100 | |
| The manufacture and capacity testing of several condensers. | 18th Aug 1919 | Box 34 \ 1 Scan101 | |
| Improvements in condenser construction, leading to a smaller condenser box design. | 18th Aug 1919 | Box 34 \ 1 Scan102 | |
| The modified assembly operations for building up condensers. | 18th Aug 1919 | Box 34 \ 1 Scan103 | |
| The manufacture and modification of several condensers, detailing their capacities and dimensions. | 20th Aug 1919 | Box 34 \ 1 Scan104 | |
| Ignition system improvements for car 1 EX, including spring materials and magneto accessibility. | 21th Aug 1919 | Box 34 \ 1 Scan105 | |
| Delay in condenser supply from the General Electric Company and a proposal for an interim order. | 1st Aug 1919 | Box 34 \ 1 Scan106 | |
| Log sheet for recording measurements and remarks for production condensers. | 22th Aug 1919 | Box 34 \ 1 Scan107 | |
| 5 thin type condensers handed to production with unmodified cases. | 23th Aug 1919 | Box 34 \ 1 Scan108 | |
| Requesting an alteration to reduce the depth of the condenser casing for the make and break gear. | 25th Aug 1919 | Box 34 \ 1 Scan109 | |
| List of new parts for the 40/50 chassis, detailing changes compared to the pre-war 40/50 HP chassis. | 27th Aug 1919 | Box 34 \ 1 Scan110 | |
| Procedure detailing the testing process for production condensers. | 29th Aug 1919 | Box 34 \ 1 Scan111 | |
| Distributing two copies of the revised and final specification for Production Condenser Tests. | 30th Aug 1919 | Box 34 \ 1 Scan112 | |
| Confirming receipt of 4 condensers and requesting the chassis details they are for. | 1st Sep 1919 | Box 34 \ 1 Scan113 | |
| Change of varnish for condensers and the creation of new fixtures to improve production. | 2nd Sep 1919 | Box 34 \ 1 Scan114 | |
| The status of production testing for various electrical components. | 30th Sep 1919 | Box 34 \ 1 Scan115 | |
| Test results and calculations for auxiliary and chassis condensers. | 7th Oct 1919 | Box 34 \ 1 Scan116 | |
| Handing over condenser testing apparatus and raising concerns about potential production issues from acid vapours. | 8th Oct 1919 | Box 34 \ 1 Scan117 | |
| Recommendation to move condenser manufacturing to a more suitable place due to dust contamination. | 8th Oct 1919 | Box 34 \ 1 Scan118 | |
| From EFC to Mr. Coverley requesting the remaking of condenser R.R.12 and another similar condenser. | 9th Oct 1919 | Box 34 \ 1 Scan119 | |
| Outlining eight required conditions for a dedicated condenser manufacturing room. | 11th Oct 1919 | Box 34 \ 1 Scan120 | |
| Procedure for testing condensers before use on a chassis. | 11th Oct 1919 | Box 34 \ 1 Scan121 | |
| Requesting a condenser spring, previously made of steel, now be made in bronze to prevent rust. | 16th Oct 1919 | Box 34 \ 1 Scan122 | |
| Confirming the condenser contact spring material has been changed to Silicon Bronze as standard. | 20th Oct 1919 | Box 34 \ 1 Scan123 | |
| Confirming that silicon bronze springs are now standard on all experimental cars. | 21th Oct 1919 | Box 34 \ 1 Scan124 | |
| Accompanying a second sample condenser from the General Electric Co. for evaluation. | 25th Oct 1919 | Box 34 \ 1 Scan125 | |
| Alternative condenser design for battery ignition proposed by the General Electric Company. | 27th Oct 1919 | Box 34 \ 1 Scan126 | |
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