| Description | Date | Identifier | |
| Letter from Newton, Chambers & Co Limited regarding a sample of 'ICO' rust preventative for cooling systems sent for testing. | 22th Apr 1937 | Box 151 \ 3 scan0207 | |
| Letter from the Experimental Department requesting a second sample of I.C.O. corrosion inhibitor for testing. | 15th Jun 1937 | Box 151 \ 3 scan0208 | |
| Letter from Newton, Chambers & Co., Limited confirming despatch of an order for corrosion inhibitor. | 17th Jun 1937 | Box 151 \ 3 scan0209 | |
| Requesting an official order for a pre-delivered I.C.O. corrosion inhibitor from Messrs Newton Chambers and Co.Ltd. | 29th Jun 1937 | Box 151 \ 3 scan0210 | |
| Letter from The County Chemical Co. Ltd requesting radiator capacity details for their 'Stop-it' Freezing Filling Chart. | 1st Jun 1937 | Box 151 \ 3 scan0211 | |
| Blank form to provide 1937-1938 season cooling system and sump capacities to a chemical company. | 1st Jan 1937 | Box 151 \ 3 scan0212 | |
| Letter to The County Chemical Co. Ltd. requesting a sample of their 'Sop-it' Anti-Freeze for examination. | 6th Jul 1937 | Box 151 \ 3 scan0213 | |
| Requesting tests on rubber hoses with a corrosion inhibiting fluid. | 20th Sep 1937 | Box 151 \ 3 scan0214 | |
| Letter from Barrett, Tagant & Gotts Ltd. regarding the contents of their Anti-Freeze Compound. | 20th Sep 1937 | Box 151 \ 3 scan0215 | |
| Letter from Newton, Chambers & Co., Ltd. regarding the supply of a product sample named 'No Co Ro' for testing. | 20th Sep 1937 | Box 151 \ 3 scan0216 | |
| Acknowledgement of receipt for two sample quarts of 'No Co Ro' for testing. | 29th Sep 1937 | Box 151 \ 3 scan0217 | |
| Letter detailing the composition of an Anti-Freeze Compound. | 30th Sep 1937 | Box 151 \ 3 scan0218 | |
| Letter from Newton, Chambers & Co. Ltd. regarding samples of No-Co-Ro, related material tests, and arranging a meeting. | 1st Oct 1937 | Box 151 \ 3 scan0219 | |
| Order for 'No-Co-Ro' corrosion inhibitor. | 16th Oct 1937 | Box 151 \ 3 scan0220 | |
| Requesting confirmation on the suitability of a third-party anti-freeze sample and its composition. | 18th Oct 1937 | Box 151 \ 3 scan0221 | |
| Letter from Price's Lubricants Limited regarding the use of Zero Anti-Freeze containing Glycerine. | 3rd Sep 1937 | Box 151 \ 3 scan0222 | |
| Letter to Price's Lubricants Ltd. concerning the use of glycerine for anti-freeze purposes in engines. | 28th Sep 1937 | Box 151 \ 3 scan0223 | |
| Letter from Price's Lubricants regarding the winter testing of their Zero Anti-Freeze product. | 30th Sep 1937 | Box 151 \ 3 scan0224 | |
| Letter to Price's Lubricants Ltd. requesting an additional 4 gallons of Zero anti-freeze. | 1st Oct 1937 | Box 151 \ 3 scan0225 | |
| Letter from Price's Lubricants confirming the dispatch of 'Zero' lubricant for proposed winter car trials. | 4th Oct 1937 | Box 151 \ 3 scan0226 | |
| Order for tins of Zero anti-freeze for use on experimental cars. | 11th Nov 1937 | Box 151 \ 3 scan0227 | |
| Letter from Chromates Limited concerning a specimen of Fortified Dichromate Radiator Compound. | 16th Nov 1937 | Box 151 \ 3 scan0228 | |
| Letter from S. Smith & Sons regarding a discrepancy in antifreeze recommendations for Bentley Motors. | 7th Dec 1937 | Box 151 \ 3 scan0229 | |
| Letter from S. Smith & Sons regarding the recommended maximum frost protection of 20% by volume for the country. | 7th Dec 1937 | Box 151 \ 3 scan0230 | |
| Suitability of diethylene glycol as an anti-freeze for cooling systems. | 29th Jan 1938 | Box 151 \ 3 scan0231 | |
| Order for 'No-Co-Ro' corrosion inhibitor from Messrs. Newton & Chambers Ltd. | 16th Jun 1938 | Box 151 \ 3 scan0232 | |
| Letter from The County Chemical Co. Ltd requesting radiator capacity details for their 'Stop-it' Freezing Filling Chart. | 1st Jun 1938 | Box 151 \ 3 scan0233 | |
| Blank form letter template providing cooling system and sump capacities for 1938-1939 models. | 1st Jan 1938 | Box 151 \ 3 scan0234 | |
| Letter to The County Chemical Co. Ltd. declining to recommend or provide particulars on their 'Stop-it' Freezing Mixture. | 2nd Jul 1938 | Box 151 \ 3 scan0235 | |
| Letter from S. Smith & Sons regarding the recommendation for their BLUECOL product in a new 1939 booklet. | 18th Jul 1938 | Box 151 \ 3 scan0236 | |
| Letter from Price's Lubricants Limited regarding supplies of 'Zero' lubricant for the winter season. | 26th Aug 1938 | Box 151 \ 3 scan0237 | |
| Letter to Price's Lubricants discussing the use of Glycerine as an anti-freeze alternative to Ethylene Glycol. | 1st Sep 1938 | Box 151 \ 3 scan0238 | |
| Supply and type of anti-freeze for 'M' Series Bentley chassis. | 2nd Sep 1938 | Box 151 \ 3 scan0239 | |
| Letter from Price's Lubricants Limited acknowledging a previous correspondence and a query about price. | 3rd Sep 1938 | Box 151 \ 3 scan0240 | |
| Order for 'No-Co-Ro' corrosion inhibitor. | 5th Sep 1938 | Box 151 \ 3 scan0241 | |
| The test procedure for 'No-Co-Ro' corrosion inhibitor on Phantom III customer cars. | 6th Sep 1938 | Box 151 \ 3 scan0242 | |
| Letter to Price's Lubricants Ltd. discussing the purchase and pricing of glycerine for anti-freeze. | 8th Sep 1938 | Box 151 \ 3 scan0243 | |
| Policy of supplying anti-freeze in 'M' Series Bentley chassis. | 6th Sep 1938 | Box 151 \ 3 scan0244 | |
| The use of anti-freeze in 'M' Series Bentley chassis during winter despatch. | 16th Sep 1938 | Box 151 \ 3 scan0245 | |
| Letter from a supplier discussing the price and suitability of various types of glycerine for cooling systems. | 7th Sep 1938 | Box 151 \ 3 scan0246 | |
| Letter from Price's Lubricants Limited regarding the supply of a lubricant grade named 'Zero'. | 7th Sep 1938 | Box 151 \ 3 scan0247 | |
| Anti-freeze mixture for 'M' Series Bentley cars. | 8th Sep 1938 | Box 151 \ 3 scan0248 | |
| The text for a label on the drain cock concerning antifreeze, and discussing the cost of the antifreeze product. | 8th Sep 1938 | Box 151 \ 3 scan0249 | |
| Letter to Vacuum Oil Co. Ltd. inquiring about the supply of 'Voco' glycerine anti-freeze for testing and potential works' use. | 9th Sep 1938 | Box 151 \ 3 scan0250 | |
| The supply and fitting of anti-freeze to 'M' Series Bentley chassis. | 10th Sep 1938 | Box 151 \ 3 scan0251 | |
| Approving the wording and proportions for 'M' Series Bentley anti-freeze labels. | 12th Sep 1938 | Box 151 \ 3 scan0252 | |
| Letter from Vacuum Oil Company declining to quote for a Glycerine base anti-freezing mixture as the product has been discontinued. | 13th Sep 1938 | Box 151 \ 3 scan0253 | |
| Letter to Barrett Tagant & Gotts Ltd. requesting composition details and a sample of their anti-freeze for trial. | 28th Sep 1937 | Box 151 \ 3 scan0254 | |
| Cover letter from S. Smith & Sons sending a booklet on Ethylene Glycol from Imperial Chemical Industries Ltd. | 1st Oct 1938 | Box 151 \ 3 scan0255 | |
| Letter from the Experimental Department to Vacuum Oil Co. Ltd. requesting samples of a radiator cleaning preparation. | 27th Oct 1938 | Box 151 \ 3 scan0256 | |
| Letter to The Vacuum Oil Co. Ltd. requesting a sample of 'Hydrotone' corrosion prevention preparation. | 28th Oct 1938 | Box 151 \ 3 scan0257 | |
| Letter from Vacuum Oil Company Limited regarding samples of radiator flush and conditioner for experimental purposes. | 28th Oct 1938 | Box 151 \ 3 scan0258 | |
| Letter from Vacuum Oil Company confirming the free-of-charge dispatch of oil products for experimental purposes. | 29th Oct 1938 | Box 151 \ 3 scan0259 | |
| Query regarding conflicting instructions on the use of 'Distilled Glycerine' anti-freeze in Bentley and Rolls-Royce cars. | 29th Oct 1938 | Box 151 \ 3 scan0260 | |
| Promotional letter from Thelson Oils for their 'Thelson' Radiator Fluid antifreeze product. | 1st Oct 1938 | Box 151 \ 3 scan0261 | |
| Request to order 'Zero' Antifreeze Glycerine from Messrs. Price for use on experimental cars. | 3rd Nov 1938 | Box 151 \ 3 scan0262 | |
| Different types of antifreeze, issues with glycerine, and recommending 'Zero' antifreeze for all models. | 3rd Nov 1938 | Box 151 \ 3 scan0263 | |
| Recommendation to update instruction books regarding the use of 'Zero' antifreeze and its comparison with Glycerine and Glycols. | 3rd Nov 1938 | Box 151 \ 3 scan0264 | |
| Request to send an official order for three tins of corrosion inhibitor to Messrs. Chromates Ltd. | 3rd Nov 1938 | Box 151 \ 3 scan0265 | |
| Inquiry regarding the supply and contract pricing for Antifreeze mixture from Prices Ltd. | 10th Nov 1938 | Box 151 \ 3 scan0266 | |
| Ordering of Zero antifreeze directly from Prices Ltd. | 12th Nov 1938 | Box 151 \ 3 scan0267 | |
| Order for six quart tins of 'No.Co.Ro' for experimental use. | 14th Nov 1938 | Box 151 \ 3 scan0268 | |
| Request to order a hydrometer to measure the quantity of antifreeze in cooling systems. | 17th Nov 1938 | Box 151 \ 3 scan0269 | |
| Requesting an order for 'No-Co-Ro' corrosion inhibitor for use on experimental cars. | 9th Dec 1938 | Box 151 \ 3 scan0270 | |
| Request to order 20 gallons of Price's 'Zero' radiator glycerine for use in the Experimental Garage. | 26th Jan 1939 | Box 151 \ 3 scan0271 | |
| Request to Price's Lubricants Ltd. for literature regarding their 'Zero' anti-freeze. | 23th Feb 1940 | Box 151 \ 3 scan0272 | |
| Letter to S. Smith & Sons requesting a replacement booklet for 'Bluecol' anti-freeze which has been mislaid. | 23th Feb 1940 | Box 151 \ 3 scan0273 | |
| Letter from Price's Lubricants Limited regarding the specifications and recommendations for 'Zero' antifreeze. | 24th Feb 1940 | Box 151 \ 3 scan0274 | |
| Cover letter from S. Smith & Sons (Motor Accessories) Ltd enclosing a Bluecol booklet. | 26th Feb 1940 | Box 151 \ 3 scan0275 | |
| Letter requesting information on the supply and demand for glycerine anti-freeze and lubricating oil. | 18th Mar 1940 | Box 151 \ 3 scan0276 | |
| Letter responding to an enquiry about anti-freeze, discussing materials like glycerine and ethylene glycol. | 26th Mar 1940 | Box 151 \ 3 scan0277 | |
| Letter to Glycerine, Ltd. requesting information on antifreeze sales trends. | 27th Mar 1940 | Box 151 \ 3 scan0278 | |
| Letter to R.G. Goodwin regarding Mr. Limb's disablement and an intention to contact Messrs Glycerine Ltd. | 27th Mar 1940 | Box 151 \ 3 scan0279 | |
| Letter to S. Smith & Sons requesting sales data on antifreeze products. | 28th Mar 1940 | Box 151 \ 3 scan0280 | |
| Inquiry to S. Smith & Sons about antifreeze sales trends. | 28th Mar 1940 | Box 151 \ 3 scan0281 | |
| Letter from S. Smith & Sons regarding a request for anti-freeze data. | 30th Mar 1940 | Box 151 \ 3 scan0282 | |
| Radiator flow impairment due to slime and precipitates from hard water, and potential solutions. | 19th Jan 1928 | Box 151 \ 3 scan0283 | |
| Laboratory report on the effects of a 'Kleenwell' salt solution for cleansing radiators. | 21th Jan 1928 | Box 151 \ 3 scan0284 | |
| Query about the optimal method and solution for cleaning engine radiators to address overheating. | 30th Mar 1928 | Box 151 \ 3 scan0285 | |
| Procedure and materials for cleaning vehicle radiators. | 2nd Apr 1928 | Box 151 \ 3 scan0286 | |
| Laboratory analysis of 'Kleenwell' Salts composition. | 3rd Apr 1928 | Box 151 \ 3 scan0287 | |
| Warning about the corrosive effect of 'Kleanwell' radiator cleaning solution on aluminium cylinder heads. | 1st Jun 1928 | Box 151 \ 3 scan0288 | |
| Investigation into the effects and chemical composition of 'Kleenwell' salts used for radiator cleansing. | 6th Jul 1928 | Box 151 \ 3 scan0289 | |
| 'Kleenwell' for radiators, expressing puzzlement that a department is unaware of previously circulated information. | 1st Jul 1928 | Box 151 \ 3 scan0290 | |
| Inquiry regarding the use of 'Kleenwell' for cleaning choked radiator tubes and its suitability for engines with aluminium cylinder heads. | 6th Jul 1928 | Box 151 \ 3 scan0291 | |
| Clarifying the two different grades of 'Kleenwell' Salts used for radiator cleansing and their chemical compositions. | 11th Jul 1928 | Box 151 \ 3 scan0292 | |
| Laboratory memo discussing the composition and cost-effectiveness of two grades of 'Kleenwell' salts for radiator cleaning. | 1st Jul 1928 | Box 151 \ 3 scan0293 | |
| Supply difficulties of the poisonous cleaner 'Kleenwell' and proposing Caustic Soda as a tested alternative. | 12th Jul 1928 | Box 151 \ 3 scan0294 | |
| Reduction in radiator tube diameter and procedures for cleaning radiators. | 1st Feb 1929 | Box 151 \ 3 scan0295 | |
| Visit to inspect the cold chamber at Messrs. Lucas Ltd. and a suggestion for its use. | 18th Apr 1934 | Box 151 \ 3 scan0296 | |
| Inquiry about the cost and installation of a cold chamber for testing engines. | 18th Apr 1934 | Box 151 \ 3 scan0297 | |
| Letter from J. & E. Hall, Ltd. acknowledging an enquiry for a cold chamber for testing cars and aero engines. | 19th Apr 1934 | Box 151 \ 3 scan0298 | |
| Letter from J. & E. Hall, Ltd. regarding a proposal for a refrigerating plant for engine testing. | 21th Apr 1934 | Box 151 \ 3 scan0299 | |
| Letter requesting an approximate cost estimate for a cold chamber for engine testing. | 23th Apr 1934 | Box 151 \ 3 scan0300 | |
| Letter from J. & E. Hall, Ltd. regarding the capabilities of a cold chamber for engine testing. | 24th Apr 1934 | Box 151 \ 3 scan0301 | |
| Letter from J. & E. HALL, LTD discussing specifications and pricing for a refrigerating plant for engine experiments. | 24th Apr 1934 | Box 151 \ 3 scan0302 | |
| Letter to Messrs. J.& E. Hall, Ltd. arranging a meeting regarding a cold chamber for engine testing. | 27th Apr 1934 | Box 151 \ 3 scan0303 | |
| Letter from J. & E. Hall, Ltd. arranging a meeting to discuss a cold room for engine testing. | 28th Apr 1934 | Box 151 \ 3 scan0304 | |
| Letter from J. & E. Hall, Ltd. to the Experimental Department confirming proposals will be sent following a recent interview. | 5th May 1934 | Box 151 \ 3 scan0305 | |
| Letter from J. & E. Hall, Ltd. regarding the requirements for a refrigerating plant for testing purposes. | 18th May 1934 | Box 151 \ 3 scan0306 | |
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