| Description | Date | Identifier | |
| Telegram from Royce regarding a robust test for a suspension system. | 17th Jul 1915 | Box 78 \ 3 scan0127 | |
| Telegram regarding radiator design, specifying tubular pipes over crinkled or square tubes. | 17th Jun 1915 | Box 78 \ 3 scan0128 | |
| Proposing tests on a crinkled radiator design to measure deflection under load and expansion due to temperature change. | 21th Jun 1915 | Box 78 \ 3 scan0129 | |
| Proposed conversion for a crinkled tube radiator design. | 24th Jun 1915 | Box 78 \ 3 scan0130 | |
| Deflection and expansion experiments carried out on a crinkled tube radiator. | 24th Jun 1915 | Box 78 \ 3 scan0131 | |
| Note on the total pressure in a 22 inch radiator when water approaches boiling point. | 1st Jul 1920 | Box 78 \ 3 scan0132 | |
| Forwarding a matter from Shell Marketing Co. regarding 'Boilerine' for consideration. | 1st Jul 1920 | Box 78 \ 3 scan0133 | |
| The purchase of Boilerine Tablets from the Shell Company for radiator maintenance. | 29th Jul 1920 | Box 78 \ 3 scan0134 | |
| Unfulfilled order for Boilerine Tablets placed with The Shell Marketing Co. | 4th Aug 1920 | Box 78 \ 3 scan0135 | |
| Instruction to stores to supply a tin of 200 'Boilerine' tablets and forward a supplier pamphlet. | 11th Aug 1920 | Box 78 \ 3 scan0136 | |
| Letter from Boilerine Limited regarding an order and instructions for water treatment tablets. | 9th Aug 1920 | Box 78 \ 3 scan0137 | |
| Letter from Boilerine Limited following up on a report and requesting test results for their water treatment tablets. | 20th Nov 1920 | Box 78 \ 3 scan0138 | |
| Letter from W. H. Dorman & Co. Ltd. endorsing 'Boilerine' tablets for use in engine water jackets. | 9th Oct 1920 | Box 78 \ 3 scan0139 | |
| Testimonial letter from W. H. Dorman & Co. recommending Boilerine tablets for preventing white deposit in engine water jackets. | 9th Oct 1920 | Box 78 \ 3 scan0140 | |
| Cover note to Mr. Hives forwarding a copy of a letter from Boilerine Ltd. concerning supplied tablets. | 31th May 1921 | Box 78 \ 3 scan0141 | |
| Letter from Boilerine Limited regarding a test of their descaling tablets in Eagle 8 engines. | 23th May 1921 | Box 78 \ 3 scan0142 | |
| The second page of a letter from Boilerine Limited, signed by the Governing Director. | 25th Aug 1921 | Box 78 \ 3 scan0143 | |
| Recommending the standardisation of pressed radiator support brackets after successful testing. | 25th Aug 1921 | Box 78 \ 3 scan0144 | |
| Requesting the standardisation of a radiator support bracket. | 31th Aug 1921 | Box 78 \ 3 scan0145 | |
| Requesting cost information for a standardisation sheet on a radiator support bracket experiment. | 16th Sep 1921 | Box 78 \ 3 scan0146 | |
| Standardisation sheet for a radiator support bracket experiment. | 23th Sep 1921 | Box 78 \ 3 scan0147 | |
| Forwarding a standardisation sheet for a radiator support bracket made from pressing instead of forging. | 30th Sep 1921 | Box 78 \ 3 scan0148 | |
| Attaching a standardisation sheet for an experiment on making a radiator support bracket from a pressing instead of a forging. | 20th Oct 1921 | Box 78 \ 3 scan0149 | |
| Standardisation of a radiator support bracket, changing from a forging to a pressing to reduce cost. | 13th Sep 1921 | Box 78 \ 3 scan0150 | |
| Specifications for the weight and capacity of a radiator for the standard 1630 chassis. | 10th Jun 1911 | Box 78 \ 3 scan0151 | |
| Radiator tests comparing a standard radiator with a German radiator on chassis 1701. | 1st Aug 1911 | Box 78 \ 3 scan0152 | |
| Diary note for following up on a job, referencing an 'X card' for details. | 1st Nov 1916 | Box 78 \ 3 scan0153 | |
| Record card for a 22'x 6' German Silver radiator. | 27th Apr 1914 | Box 78 \ 3 scan0154 | |
| Radiator tests with temperature readings under various running conditions. | 12th Jun 1912 | Box 78 \ 3 scan0155 | |
| The delivery of three German Silver radiators and a request to track their performance on chassis. | 9th Apr 1914 | Box 78 \ 3 scan0156 | |
| Departmental memo regarding the delivery and fitting of three German Silver radiators to production cars. | 15th Apr 1914 | Box 78 \ 3 scan0157 | |
| Fitting of three German silver radiators for wear monitoring purposes. | 27th Apr 1914 | Box 78 \ 3 scan0158 | |
| Internal inquiry regarding reports on German Silver Radiators with phosphor bronze centres fitted to specific chassis. | 16th Nov 1914 | Box 78 \ 3 scan0159 | |
| Reporting on the wear of three German silver radiators fitted with phosphor bronze centres. | 17th Nov 1914 | Box 78 \ 3 scan0160 | |
| Letter discussing test results on engine cooling and suggestions for improving the fan and radiator. | 8th Sep 1912 | Box 78 \ 3 scan0161 | |
| Information on any complaints regarding specific radiators fitted to chassis 33PB, 45RB, and 47PB. | 11th May 1915 | Box 78 \ 3 scan0162 | |
| Responding to a query about the wear of three German silver radiators with phosphor bronze centres. | 13th May 1915 | Box 78 \ 3 scan0163 | |
| Vehicle test conducted on Broccone Pass, detailing cooling performance over three ascents. | 10th Dec 1918 | Box 78 \ 3 scan0164 | |
| Visit from a supplier regarding various radiator tube designs and weights. | 10th Dec 1918 | Box 78 \ 3 scan0165 | |
| Visit from Orme, Evans & Co. Limited regarding the supply and testing of radiators for the 40/50 chassis. | 30th Jan 1919 | Box 78 \ 3 scan0166 | |
| Old type radiator from Orme Evans & Co Ltd. for experimental purposes. | 4th Mar 1919 | Box 78 \ 3 scan0167 | |
| Notification regarding a clerical error on an advice note for a G.S. Radiator, rendering it unsuitable for experimental use. | 5th Mar 1919 | Box 78 \ 3 scan0168 | |
| Price reduction for standard radiators and a proposal to test a new design with larger tubes for a lower cost. | 28th Feb 1921 | Box 78 \ 3 scan0169 | |
| Delivery and location of experimental radiators for the Goshawk II Chassis. | 21th Sep 1922 | Box 78 \ 3 scan0170 | |
| Letter from The Steam Fittings Co. regarding an enquiry for a 'Samson' automatic temperature regulator and requesting a sketch. | 25th Aug 1921 | Box 78 \ 3 scan0171 | |
| Introductory leaflet for automatic temperature control systems, highlighting their benefits in fuel saving and efficiency. | 1st Jun 1921 | Box 78 \ 3 scan0172 | |
| From The Steam Fittings Co. Ltd. describing Automatic Temperature Regulators for rooms and liquids. | 1st Jun 1921 | Box 78 \ 3 scan0173 | |
| Brochure for 'SAMSON' automatic temperature regulators for rooms and liquids, detailing their technical applications and operation. | 1st Jun 1921 | Box 78 \ 3 scan0174 | |
| Product specification sheet for 'SAMSON' Automatic Temperature Regulators, detailing its components and principle of operation. | 1st Jun 1921 | Box 78 \ 3 scan0175 | |
| Price list and specification sheet for 'Samson' Automatic Temperature Regulators for rooms. | 1st Jun 1921 | Box 78 \ 3 scan0176 | |
| Price list and specification sheet for 'SAMSON' automatic temperature regulators for rooms. | 1st Jun 1921 | Box 78 \ 3 scan0177 | |
| Product data sheet for 'Samson' Automatic Temperature Regulators, including prices, specifications, and diagrams. | 1st Jun 1921 | Box 78 \ 3 scan0178 | |
| Dimensional specifications sheet for 'SAMSON' automatic temperature regulators. | 1st Jul 1921 | Box 78 \ 3 scan0179 | |
| Product leaflet for S.F. Strainers from The Steam Fittings Co. Ltd. | 1st Jul 1921 | Box 78 \ 3 scan0180 | |
| Product data sheet for S.F. Strainers showing sizes, dimensions, weights, prices and code words. | 1st Jul 1921 | Box 78 \ 3 scan0181 | |
| Product sheet for automatic air valves for radiators and steam pipes. | 1st Jul 1921 | Box 78 \ 3 scan0182 | |
| Product list of heating installation appliances from The Steam Fittings Co. Ltd. | 1st Jul 1921 | Box 78 \ 3 scan0183 | |
| Product specification sheet for the 'Samson' Safety Mixing Valve. | 1st Jul 1921 | Box 78 \ 3 scan0184 | |
| Specification sheet detailing dimensions and prices for 'Samson' safety mixing valves with automatic temperature regulation. | 1st Jul 1921 | Box 78 \ 3 scan0185 | |
| Leaflet for The 'Samson' Thermometer from The Steam Fittings Co. Ltd., detailing its features, types, and pricing. | 1st Jul 1921 | Box 78 \ 3 scan0186 | |
| Letter from The Steam Fittings Co. following up on a proposal for automatically regulating engine water temperature. | 8th Sep 1921 | Box 78 \ 3 scan0187 | |
| Letter of enquiry to The Steam Fitting Co. Ltd. regarding the working principles of their automatic radiators and sylphon tubes. | 15th Sep 1921 | Box 78 \ 3 scan0188 | |
| Letter from The Steam Fittings Co. Ltd. regarding the functionality of their standard regulator and quoting for custom designs. | 19th Sep 1921 | Box 78 \ 3 scan0189 | |
| Brochure for 'SAMSON' automatic temperature regulators for rooms and liquids, from The Steam Fittings Co. Ltd. | 20th Sep 1921 | Box 78 \ 3 scan0190 | |
| Product information leaflet for 'SAMSON' Automatic Temperature Regulators. | 20th Sep 1921 | Box 78 \ 3 scan0191 | |
| Testing of six 'Lodge' Ignition Plugs. | 26th Jun 1913 | Box 79 \ 1 scan0001 | |
| The testing of 12 weatherproof Lodge Plugs on experimental cars. | 5th Nov 1913 | Box 79 \ 1 scan0002 | |
| Opinion from the Experimental Department on six sample Lodge Ignition Plugs. | 16th Jan 1914 | Box 79 \ 1 scan0003 | |
| Test report on twelve submitted Lodge Weatherproof Model X601 spark plugs. | 16th Jan 1914 | Box 79 \ 1 scan0004 | |
| The testing and comparison of Lodge sparking plugs against Bosch models. | 26th Jan 1914 | Box 79 \ 1 scan0005 | |
| Partial sentence from sheet 2 of a document regarding an ebonite cover. | 26th Jan 1914 | Box 79 \ 1 scan0006 | |
| Experiments on 'Lodge' Sparking Plugs, attaching a report and seeking Mr. Royce's view on standardisation. | 26th Jan 1914 | Box 79 \ 1 scan0007 | |
| Testing of 'Lodge' Sparking Plugs as a domestic alternative to Bosch. | 29th Jan 1914 | Box 79 \ 1 scan0008 | |
| Copy of a letter from The Lodge Sparking Plug Co. Ltd. regarding order AG902 for spark plugs with 2-point gaps and new steel spigots. | 3rd Feb 1914 | Box 79 \ 1 scan0009 | |
| Suggestion by Mr. Royce to experiment with and order Lodge Sparking Plugs. | 5th Feb 1914 | Box 79 \ 1 scan0010 | |
| Documents regarding Lodge Sparking Plugs for Mr. Johnson's information. | 28th Feb 1914 | Box 79 \ 1 scan0011 | |
| Correspondence regarding the testing and development of Lodge sparking plugs. | 6th Feb 1914 | Box 79 \ 1 scan0012 | |
| The stock of Lodge Plugs. | 6th Feb 1914 | Box 79 \ 1 scan0013 | |
| Requests for testing different models of Lodge sparking plugs. | 7th Feb 1914 | Box 79 \ 1 scan0014 | |
| 'Lodge' Sparking Plugs, including Mr. Hives' remarks on their design. | 10th Feb 1914 | Box 79 \ 1 scan0015 | |
| Requesting a comparison between Reflex, Lodge, and Bosch sparking plugs. | 24th Apr 1914 | Box 79 \ 1 scan0016 | |
| Extract from Mr. Hives's report on a 10,000-mile engine bench test, detailing the performance of Bosch and Lodge spark plugs. | 21th May 1914 | Box 79 \ 1 scan0017 | |
| Recommending Lodge sparking plugs over Bosch based on mileage and bench testing. | 16th Jul 1914 | Box 79 \ 1 scan0018 | |
| Testing and comparison of Lodge and Bosch sparking plugs. | 21th Jul 1914 | Box 79 \ 1 scan0019 | |
| From Mr. Hives recommending the use of new type Bosch or Lodge Plugs. | 21th Jul 1914 | Box 79 \ 1 scan0020 | |
| Recommendation to use three-pointer Lodge Sparking Plugs following positive results from severe testing. | 24th Jul 1914 | Box 79 \ 1 scan0021 | |
| The standardisation of Lodge ignition plugs over Bosch and the inadvisability of the Bosch electric lighting system. | 25th Aug 1914 | Box 79 \ 1 scan0022 | |
| Request for three replacement Lodge Plugs for chassis 58NA due to a broken porcelain. | 19th Aug 1914 | Box 79 \ 1 scan0023 | |
| To Mr Mills regarding an issue with despatching three Lodge Plugs to Mr Royce. | 21th Aug 1914 | Box 79 \ 1 scan0024 | |
| The standardisation of ignition plugs. | 1st Sep 1914 | Box 79 \ 1 scan0025 | |
| Internal order for one dozen Lodge double pole sparking plugs for the Experimental Department. | 12th Nov 1914 | Box 79 \ 1 scan0026 | |
| The extensive testing and comparison of Lodge Sparking Plugs against Bosch plugs. | 18th Nov 1914 | Box 79 \ 1 scan0027 | |
| Performance of Lodge plugs and their standardization. | 23th Oct 1914 | Box 79 \ 1 scan0028 | |
| The testing of new C2 type Lodge sparking plugs for 1915 demands. | 5th Dec 1914 | Box 79 \ 1 scan0029 | |
| The testing of new 'C2' Lodge sparking plugs for potential supply in 1915. | 7th Dec 1914 | Box 79 \ 1 scan0030 | |
| Report from Mr. Hives on a new design of Lodge Sparking Plugs, recommending testing and further inquiry. | 14th Dec 1914 | Box 79 \ 1 scan0031 | |
| For the Experimental Department regarding Sparking Plugs and an attached letter from Lodge. | 18th Dec 1914 | Box 79 \ 1 scan0032 | |
| Letter from The Lodge Sparking Plug Co. Ltd. regarding a change in spark plug design due to material supply issues from Germany. | 17th Dec 1914 | Box 79 \ 1 scan0033 | |
| Letter from The Lodge Sparking Plug Co. Ltd. concerning the supply of an older plug design for order No. AP577. | 17th Sep 1914 | Box 79 \ 1 scan0034 | |
| Experimental job on Lodge Sparking Plugs. | 17th Sep 1914 | Box 79 \ 1 scan0035 | |
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