| Description | Date | Identifier | |
| Extract from a 10,000-mile test report detailing battery ignition issues due to an imperfect condenser connection. | 21th Apr 1920 | Box 35 \ 5 scan 100 | |
| Material composition of 'Sparkite' contact points, comparing silver, tungsten, and platinum. | 26th Apr 1920 | Box 35 \ 5 scan 101 | |
| List of various magnetos awaiting testing, detailing manufacturers, models, and reference numbers. | 27th Apr 1920 | Box 35 \ 5 scan 102 | |
| The difficulties and testing of tungsten low tension contact points. | 29th Apr 1920 | Box 35 \ 5 scan 103 | |
| The testing of tungsten rivets and contacts for ignition systems and magnetos. | 29th Apr 1920 | Box 35 \ 5 scan 104 | |
| The testing and replacement of tungsten and sparkite low tension contact points. | 29th Apr 1920 | Box 35 \ 5 scan 105 | |
| Requesting trials on a new, softer sample of Tungsten for machining into rivets for contact points. | 30th Apr 1920 | Box 35 \ 5 scan 106 | |
| Returning sparkite points and supplying new tungsten contacts from an American company. | 8th Jan 1920 | Box 35 \ 5 scan 107 | |
| Fitting of Tungsten Contacts, supplied by the Ind. Lamp and Wire Co., to the Contact Breaker on chassis 4.EX. | 5th May 1920 | Box 35 \ 5 scan 108 | |
| Suggestion to transfer tungsten contact points from chassis 49-GB to chassis 6 EX for inspection by Mr. Royce. | 3rd Jun 1920 | Box 35 \ 5 scan 109 | |
| Transfer of Tungsten Contact Points from one vehicle to another. | 23th Jun 1920 | Box 35 \ 5 scan 110 | |
| Performance of tungsten contact points on a chassis. | 25th Jun 1920 | Box 35 \ 5 scan 111 | |
| The replacement of tungsten points with platinum points on a component. | 25th Jun 1920 | Box 35 \ 5 scan 112 | |
| Troubleshooting of low tension contact points by comparing them with those from a Delco ignition system. | 28th Jun 1920 | Box 35 \ 5 scan 113 | |
| Forwarding a letter from America regarding tungsten contact points and requesting a report in triplicate. | 11th Aug 1920 | Box 35 \ 5 scan 114 | |
| Letter concerning the testing and performance report of Tungsten Contact Points. | 28th Jul 1920 | Box 35 \ 5 scan 115 | |
| Enquiries and reports on tungsten contact points for electrical experimental work. | 12th Aug 1920 | Box 35 \ 5 scan 116 | |
| The unsatisfactory performance of tungsten contact points and the conclusion that platinum is the only safe alternative for ignition. | 12th Aug 1920 | Box 35 \ 5 scan 117 | |
| Attaching Tungsten Points removed from 6 EX, which were previously omitted. | 14th Aug 1920 | Box 35 \ 5 scan 118 | |
| Mr. Royce's dissatisfaction with tungsten point tests and a directive to trial points from a Delco ignition. | 16th Aug 1920 | Box 35 \ 5 scan 119 | |
| Removing tungsten contact points from a Liberty ignition to fit onto a chassis ignition for experimental testing. | 17th Aug 1920 | Box 35 \ 5 scan 120 | |
| Fitting silver and tungsten sparking points to a distributor for testing. | 25th Aug 1920 | Box 35 \ 5 scan 121 | |
| Instruction detailing the fitting of a distributor with silver spark points and tungsten contacts. | 25th Aug 1920 | Box 35 \ 5 scan 122 | |
| Fitting of Tungsten Contacts from a Liberty Distributor to chassis 4.EX. | 1st Sep 1920 | Box 35 \ 5 scan 123 | |
| Forwarding a copy of a letter from America and requesting a report in triplicate. | 15th Sep 1920 | Box 35 \ 5 scan 124 | |
| Letter from Rolls-Royce of America regarding test failures of Tungsten Contact Points. | 27th Aug 1920 | Box 35 \ 5 scan 125 | |
| Testing of tungsten points from a Delco Liberty ignition on a standard chassis. | 24th Sep 1920 | Box 35 \ 5 scan 126 | |
| The unsatisfactory performance of tungsten contact points and related manufacturing difficulties. | 27th Sep 1920 | Box 35 \ 5 scan 127 | |
| Requesting the return of failed tungsten ignition points for inspection by Mr. Olley and the American supplier. | 27th Sep 1920 | Box 35 \ 5 scan 128 | |
| Test report comparing tungsten contacts for high and low tension points from various firms. | 28th Sep 1920 | Box 35 \ 5 scan 129 | |
| Continued log sheet detailing tests and remarks on various contacts and rods from different suppliers. | 28th Sep 1920 | Box 35 \ 5 scan 130 | |
| The determination of the specific resistance of a tungsten rod. | 1st Oct 1920 | Box 35 \ 5 scan 131 | |
| Instruction sheet detailing the modification and fitting of Delco Tungsten points from a Liberty ignition system. | 8th Oct 1920 | Box 35 \ 5 scan 132 | |
| Instruction sheet detailing an experiment on the contact resistance of tungsten. | 12th Oct 1920 | Box 35 \ 5 scan 133 | |
| Experiment investigating the contact resistance of tungsten rods. | 24th Jan 1919 | Box 35 \ 5 scan 134 | |
| Instruction sheet detailing experiments on the contact resistance of tungsten rods. | 24th Jan 1919 | Box 35 \ 5 scan 135 | |
| Instruction note regarding the contact resistance of tungsten contacts. | 24th Jan 1919 | Box 35 \ 5 scan 136 | |
| From EFC to E. enquiring about the location of tungsten points for inspection. | 13th Oct 1920 | Box 35 \ 5 scan 137 | |
| Return of a blade and screw with tungsten points tested on an experimental car. | 13th Oct 1920 | Box 35 \ 5 scan 138 | |
| Inspection of tungsten ignition points from experimental cars and the difficulty in their manufacture. | 14th Oct 1920 | Box 35 \ 5 scan 139 | |
| Electrical test observing the oxidation of tungsten points. | 15th Aug 1920 | Box 35 \ 5 scan 140 | |
| And diagrams detailing an experiment on the contact resistance of oxidised tungsten points. | 24th Jan 1919 | Box 35 \ 5 scan 141 | |
| Experiment observing the oxidation of Tungsten Points. | 24th Jan 1919 | Box 35 \ 5 scan 142 | |
| Letter from Rolls-Royce of America regarding the machining of tungsten rods for tungsten points. | 19th Oct 1920 | Box 35 \ 5 scan 143 | |
| Investigation into the contact resistance of tungsten points in an electrical circuit. | 20th Oct 1920 | Box 35 \ 5 scan 144 | |
| Observation on the effects of current on electrical contacts, specifically regarding resistance and discoloration. | 20th Oct 1920 | Box 35 \ 5 scan 145 | |
| Return of a tungsten contact piece and screw off a 6 EX. | 1st Oct 1920 | Box 35 \ 5 scan 146 | |
| Letter from the American branch to London regarding reports and samples of Tungsten Points. | 28th Oct 1920 | Box 35 \ 5 scan 147 | |
| Inspection of a second set of tungsten ignition contact points run on an experimental car. | 29th Oct 1920 | Box 35 \ 5 scan 148 | |
| Letter from the Tungsten Manufacturing Co Ltd regarding an enquiry for Tungsten Contacts. | 15th Nov 1920 | Box 35 \ 5 scan 149 | |
| The return of Tungsten Contact Points to Springfield. | 18th Nov 1920 | Box 35 \ 5 scan 150 | |
| Letter discussing issues with machining Tungsten alloy rods and sourcing alternative contacts. | 26th Oct 1920 | Box 35 \ 5 scan 151 | |
| The concluding page of a letter to Mr. Claude Johnson about giving makers another trial. | 28th Oct 1920 | Box 35 \ 5 scan 152 | |
| Letter from Fansteel Products Company discussing the manufacturing process and requirements for tungsten parts. | 22th Oct 1920 | Box 35 \ 5 scan 153 | |
| Letter from Rolls-Royce of America regarding a report on Tungsten Points and the manufacturing of sample contacts. | 19th Nov 1920 | Box 35 \ 5 scan 154 | |
| Tungsten contact and distributor sparking points, including supplier rights and ongoing testing. | 22th Nov 1920 | Box 35 \ 5 scan 155 | |
| Letter discussing the challenges of welding Tungsten and returning unused rods and contacts to suppliers. | 22th Nov 1920 | Box 35 \ 5 scan 156 | |
| The correct fitting of Tungsten points and the capabilities of various manufacturing companies. | 22th Nov 1920 | Box 35 \ 5 scan 157 | |
| Re-make of chassis governor drive and brake spring plates to be fitted with tungsten points. | 6th Dec 1920 | Box 35 \ 5 scan 158 | |
| Sending ignition blades and screws to be fitted with tungsten points for testing in the U.S.A. | 7th Dec 1920 | Box 35 \ 5 scan 159 | |
| Letter from the American division concerning the supply and testing of Tungsten contacts for battery ignition systems. | 9th Dec 1920 | Box 35 \ 5 scan 160 | |
| Letter from Rolls-Royce of America suggesting the English Works source Tungsten parts from a UK-based affiliate for more prompt service. | 23th Dec 1920 | Box 35 \ 5 scan 161 | |
| Letter from Rolls-Royce of America concerning the forwarding of six sets of Tungsten contacts made by Fansteel Products Co. | 23th Dec 1920 | Box 35 \ 5 scan 162 | |
| Letter from Fansteel Products Company regarding the supply and properties of tungsten contacts for ignition systems. | 8th Dec 1920 | Box 35 \ 5 scan 163 | |
| Internal memorandum from EWT to EFC requesting a report on Tungsten Contacts. | 24th Dec 1920 | Box 35 \ 5 scan 164 | |
| Letter from Tungsten Manufacturing Co. Ltd. regarding the supply of Tungsten-faced contacts fitted to springs and screws for testing. | 29th Dec 1920 | Box 35 \ 5 scan 165 | |
| Sending Tungsten contacts from the Fansteel Products Co. for testing on battery ignition systems. | 31th Dec 1920 | Box 35 \ 5 scan 166 | |
| Instructions from Fansteel Products Company U.S.A. for the fitting of Tungsten Contacts. | 1st Nov 1929 | Box 35 \ 5 scan 167 | |
| Requesting an official order for the fitting of tungsten points to battery ignition components. | 31th Dec 1920 | Box 35 \ 5 scan 168 | |
| The use of a car for testing experimental parts, specifically tungsten contact points and Bleriot cutouts. | 31th Dec 1920 | Box 35 \ 5 scan 169 | |
| The receipt and marking of tungsten contacts from two different suppliers. | 1st Jan 1921 | Box 35 \ 5 scan 170 | |
| The dispatch of four sets of blades with tungsten contacts for testing on experimental cars. | 3rd Jan 1921 | Box 35 \ 6 scan 001 | |
| Letter from Tungsten Manufacturing Co. Ltd. concerning the testing of supplied Tungsten Contacts. | 6th Jan 1921 | Box 35 \ 6 scan 002 | |
| Fitting blades and screws with tungsten points to 7-CA and 2.EX car engines. | 6th Jan 1921 | Box 35 \ 6 scan 003 | |
| Communication regarding the supply of an outside battery case and a preference against fitting certain electrical components. | 6th Jan 1921 | Box 35 \ 6 scan 004 | |
| Fitting issue with tungsten contacts on blades. | 7th Jan 1921 | Box 35 \ 6 scan 005 | |
| Test report on Tungsten contact points for a U.S. & Bosch Magneto. | 10th Jan 1921 | Box 35 \ 6 scan 006 | |
| Investigation into faulty sparking points and contact-breaker settings, which resulted in a soldered point coming off. | 10th Jan 1921 | Box 35 \ 6 scan 007 | |
| Letter from Rolls-Royce of America concerning the dispatch of six battery ignition blades with Tungsten contact points. | 18th Jan 1921 | Box 35 \ 6 scan 008 | |
| Testing tungsten points from a Liberty Delco ignition for use in standard battery ignition systems. | 21th Jan 1921 | Box 35 \ 6 scan 009 | |
| 390-hour test of Liberty tungsten contact points in a battery ignition system. | 21th Jan 1921 | Box 35 \ 6 scan 010 | |
| Test report on tungsten points from the Independent Lamp and Wire Co. noting defects and sparking. | 16th Dec 1920 | Box 35 \ 6 scan 011 | |
| Test report on the failure of Tungsten Points in a Watford Magneto due to arcing. | 24th Jan 1921 | Box 35 \ 6 scan 012 | |
| Unsatisfactory experimental trials of tungsten contact points for magnetos. | 25th Jan 1921 | Box 35 \ 6 scan 013 | |
| The performance of Tungsten make and break points after 3,000 miles of use compared to standard contacts. | 25th Jan 1921 | Box 35 \ 6 scan 014 | |
| Query regarding the compatibility of tungsten points with different battery ignition systems. | 26th Jan 1921 | Box 35 \ 6 scan 015 | |
| Query regarding the markings and fitment of tungsten contacts for a battery ignition make & break system. | 27th Jan 1921 | Box 35 \ 6 scan 016 | |
| Poor performance of tungsten ignition points from a Liberty Delco system compared to standard and experimental contacts. | 28th Jan 1921 | Box 35 \ 6 scan 017 | |
| The bench testing of distributor sparking points made from various materials for a battery ignition system. | 28th Jan 1921 | Box 35 \ 6 scan 018 | |
| Markings for sparking points made of various metals and seeking instructions for further testing. | 28th Jan 1921 | Box 35 \ 6 scan 019 | |
| The bench testing of various materials for distributor sparking points in a battery ignition system. | 1st May 1923 | Box 35 \ 6 scan 020 | |
| Report page detailing the wear and tear on various metal components like Nichrome, Nickel-Brass, and Nickel. | 11th Dec 1929 | Box 35 \ 6 scan 021 | |
| Requesting the return of components for an additional 100 hours of testing. | 15th Feb 1921 | Box 35 \ 6 scan 022 | |
| Letter from C. Melin & Co. introducing their 'NEO-TUNGSTEN' screw contacts for magnetos and contact breakers. | 15th Feb 1921 | Box 35 \ 6 scan 023 | |
| Letter from a supplier regarding a new Tungsten Contact for Magneto Work, including a specimen. | 16th Feb 1931 | Box 35 \ 6 scan 024 | |
| Letter to Messrs. G.G. Blackwell Sons & Co. Ltd. regarding experiments on tungsten contacts for magnetos. | 18th Feb 1921 | Box 35 \ 6 scan 025 | |
| The testing of Tungsten contacts for battery ignition make and break systems. | 24th Feb 1921 | Box 35 \ 6 scan 026 | |
| U.S.A. Bosch battery ignition system, its components, and supply conditions from Delco. | 2nd Feb 1921 | Box 35 \ 6 scan 027 | |
| Cover note regarding a letter from America about tungsten contact points for magnetos. | 1st Mar 1921 | Box 35 \ 6 scan 028 | |
| Letter from Rolls-Royce of America regarding the use of tungsten contact points for magnetos and battery ignition. | 15th Feb 1921 | Box 35 \ 6 scan 029 | |
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