| Description | Date | Identifier | |
| Request to construct and fit a different cam and throttle lever arrangement for an automatic idling device. | 13th Dec 1934 | Box 156 \ 1 scan0056 | |
| Request to F.W. Miller & Co. to manufacture a bimetallic strip and provide performance data. | 15th Dec 1934 | Box 156 \ 1 scan0057 | |
| Internal request to order one bimetal strip from F.W. Miller & Co. Ltd. | 17th Dec 1934 | Box 156 \ 1 scan0058 | |
| Letter from F. W. Miller & Co., Ltd. acknowledging a request for a Thermostatic Metal coil. | 17th Dec 1934 | Box 156 \ 1 scan0059 | |
| Letter from F.W. Miller & Co., Ltd. regarding a sample Thermostatic Bi-metal Coil. | 20th Dec 1934 | Box 156 \ 1 scan0060 | |
| Request to order four bimetal spiral strips with specific dimensions from F.W. Miller and Co. Ltd. | 19th Dec 1934 | Box 156 \ 1 scan0061 | |
| Dispatching a bimetal coil and a Harrison Vee radiator matrix sample to two separate parties. | 27th Dec 1934 | Box 156 \ 1 scan0062 | |
| Letter to a supplier returning a faulty bimetal coil and requesting a replacement with modified specifications. | 27th Dec 1934 | Box 156 \ 1 scan0063 | |
| Letter from The Packless Gland Co. Ltd. regarding a material failure on an experimental Bentley Mixture Control unit. | 15th Jan 1935 | Box 156 \ 1 scan0064 | |
| Comparing a 'Tank' Thermostat with a standard 'SMITHERMET' thermostat. | 18th Jan 1935 | Box 156 \ 1 scan0065 | |
| Requesting an urgent order for six modified Spectre Water Temperature Regulating Thermostats. | 15th Mar 1935 | Box 156 \ 1 scan0066 | |
| Return of six thermostats that do not conform to temperature limits. | 3rd Apr 1935 | Box 156 \ 1 scan0067 | |
| Letter of complaint regarding the return of six faulty thermostats that did not meet temperature specifications. | 3rd Apr 1935 | Box 156 \ 1 scan0068 | |
| Letter from The British Thermostat Co. Ltd. regarding the testing and adjustment of six thermostats, including a table of results. | 10th Apr 1935 | Box 156 \ 1 scan0069 | |
| Letter discussing the design and manufacturing challenges of a bellows thermostat, highlighting issues with adjustment, tolerances, and the lack of a movement stop. | 10th Apr 1935 | Box 156 \ 1 scan0070 | |
| Letter from The British Thermostat Co. Ltd. discussing the complex and costly construction of thermostat E.86612. | 15th Apr 1935 | Box 156 \ 1 scan0071 | |
| Letter to The British Thermostat Co. Ltd. discussing the testing and performance of their corrected thermostats. | 15th Apr 1935 | Box 156 \ 1 scan0072 | |
| Letter discussing production difficulties and proposed specifications for new thermostats, including temperature limits and alternative spring arrangements. | 15th Apr 1935 | Box 156 \ 1 scan0073 | |
| Letter from The British Thermostat Co. Ltd. regarding the design and manufacturing of thermostats, part number E. 86612, for a cooling system. | 16th Apr 1935 | Box 156 \ 1 scan0074 | |
| Thermostat testing procedures, operating temperatures, valve operation, and bellows design. | 16th Apr 1935 | Box 156 \ 1 scan0075 | |
| Letter from The British Thermostat Co. Ltd. providing suggestions on valve temperature settings and manufacturing. | 24th Apr 1935 | Box 156 \ 1 scan0076 | |
| Letter to The British Thermostat Co. Ltd. discussing design alterations for thermostats, part no. E.86612. | 24th Apr 1935 | Box 156 \ 1 scan0077 | |
| Letter discussing valve temperature settings and design alterations for bellows length. | 29th Apr 1935 | Box 156 \ 1 scan0078 | |
| Development, testing, and standardization of an isolated change speed lever for a Bentley. | 29th Apr 1935 | Box 156 \ 1 scan0079 | |
| Request for two sets of Spectre Thermostat Upper Valves to be made. | 30th Apr 1935 | Box 156 \ 1 scan0080 | |
| Urgent order for six modified thermostats from the British Thermostat Co. Ltd. | 3rd May 1935 | Box 156 \ 1 scan0081 | |
| Letter to The British Thermostat Co. Ltd. following up on a previous query and placing an order for six thermostats with specific temperature requirements. | 3rd May 1935 | Box 156 \ 1 scan0082 | |
| Letter from The British Thermostat Co. Ltd. discussing the specifications of thermostat part number E.86612. | 7th May 1935 | Box 156 \ 1 scan0083 | |
| Page two of a letter from The British Thermostat Co. Ltd. discussing a valve stem. | 8th May 1935 | Box 156 \ 1 scan0084 | |
| Letter from a supplier discussing an order for thermostats and proposing a potentially costly design modification. | 8th May 1935 | Box 156 \ 1 scan0085 | |
| Letter of inquiry to S. Smith & Sons, Ltd. regarding the manufacture of a car thermostat. | 8th May 1935 | Box 156 \ 1 scan0086 | |
| Letter from S. Smith & Sons regarding the design and specifications of thermostat E.86612. | 10th May 1935 | Box 156 \ 1 scan0087 | |
| Letter from S. Smith & Sons discussing the operational forces on a thermostat valve and proposing modifications. | 10th May 1935 | Box 156 \ 1 scan0088 | |
| Requesting the testing of a remote-acting thermostat and outlining the correct experimental setup. | 13th May 1935 | Box 156 \ 1 scan0089 | |
| Letter to the British Thermostat Co. Ltd. regarding an urgent order for thermostats and proposing an alternative model. | 15th May 1935 | Box 156 \ 1 scan0090 | |
| Letter to supplier S. Smith & Sons discussing the manufacture and design of a spring-loaded thermostat. | 15th May 1935 | Box 156 \ 1 scan0091 | |
| Letter requesting advice on the balance of a thermostat with regard to water pressure. | 15th May 1935 | Box 156 \ 1 scan0092 | |
| Letter from The British Thermostat Co., Ltd. discussing an order for thermostats, specifically regarding the bellows length and design. | 16th May 1935 | Box 156 \ 1 scan0093 | |
| Letter from The British Thermostat Co. Ltd. discussing thermostat design and temperature specifications. | 16th May 1935 | Box 156 \ 1 scan0094 | |
| Letter from S. Smith & Sons regarding the design, specifications and testing of a thermostatic valve. | 16th May 1935 | Box 156 \ 1 scan0095 | |
| Letter to The British Thermostat Co. Ltd. querying the design, manufacture, and temperature range of thermostats. | 17th May 1935 | Box 156 \ 1 scan0096 | |
| Letter requesting technical data on temperature range and bellows rate to understand certain difficulties. | 17th May 1935 | Box 156 \ 1 scan0097 | |
| Letter from The British Thermostat Co. Ltd. discussing thermostat design and the lack of an adjustment feature. | 20th May 1935 | Box 156 \ 1 scan0098 | |
| Manufacturing challenges and supply of thermostats and bellows. | 20th May 1935 | Box 156 \ 1 scan0099 | |
| Page discussing the function and efficiency of a thermostat as a mixing valve in a cooling system. | 20th May 1935 | Box 156 \ 1 scan0100 | |
| Engine cooling system thermostat and by-pass operation, including water flow timings and temperature control. | 20th May 1935 | Box 156 \ 1 scan0101 | |
| Letter comparing the specifications of different thermostat bellows. | 20th May 1935 | Box 156 \ 1 scan0102 | |
| Letter from The British Thermostat Co. Ltd. to Rolls-Royce discussing thermostat manufacturing and design feedback. | 21th May 1935 | Box 156 \ 1 scan0103 | |
| Remote acting thermostat from H.M. Hobson Limited and a proposed interview. | 21th May 1935 | Box 156 \ 1 scan0104 | |
| Letter from H.M. Hobson Ltd. regarding tests and specifications for a remote acting thermostat. | 20th May 1935 | Box 156 \ 1 scan0105 | |
| Confirming a conversation about the thermostat shutter operation on the Spectre. | 28th May 1935 | Box 156 \ 1 scan0106 | |
| Letter chasing an overdue order for a special water temperature regulating thermostat from S. Smith & Sons Ltd. | 6th Jun 1935 | Box 156 \ 1 scan0107 | |
| The testing of a Hobson remote acting thermostat, noting issues with sticking and comparing it to standard calorstats. | 7th Jun 1935 | Box 156 \ 1 scan0108 | |
| Graph plotting temperature against force for a Hobson Remote Acting Thermostat at different lift settings. | 6th Jun 1935 | Box 156 \ 1 scan0109 | |
| Graph plotting the lift of a top plate against temperature for a Hobbs remote acting thermostat test. | 6th Aug 1935 | Box 156 \ 1 scan0110 | |
| Letter from S. Smith & Sons regarding ongoing thermostat experiments and awaiting fluids with a higher boiling point. | 7th Jun 1935 | Box 156 \ 1 scan0111 | |
| Letter from The British Thermostat Co., Ltd. regarding the dimensions of an experimental apparatus. | 26th Oct 1935 | Box 156 \ 1 scan0112 | |
| Letter to S. Smith & Sons specifying the requirements for a thermostat bellows to operate bonnet shutters. | 23th Oct 1935 | Box 156 \ 1 scan0113 | |
| Request for an opinion on the design specifications for bellows needed for a thermostat. | 23th Oct 1935 | Box 156 \ 1 scan0114 | |
| Letter outlining the technical requirements for a thermostat bellows to operate bonnet shutters. | 23th Oct 1935 | Box 156 \ 1 scan0115 | |
| Letter requesting an opinion on the design for the smallest size and length of bellows for a thermostat. | 23th Oct 1935 | Box 156 \ 1 scan0116 | |
| Letter from S. Smith & Sons concerning thermostats for automatic louvres. | 26th Oct 1935 | Box 156 \ 1 scan0117 | |
| Letter from The British Thermostat Co. Ltd. regarding the dispatch and testing of a bonnet louvre control unit. | 28th Oct 1935 | Box 156 \ 1 scan0118 | |
| Letter to Ford Motor Co. requesting information about the thermostat-operated bonnet shutters on Lincoln cars. | 26th Oct 1935 | Box 156 \ 1 scan0119 | |
| Letter to The British Thermostat Co. Ltd. regarding a thermostat unit and arranging a meeting to discuss bellow manufacture. | 29th Oct 1935 | Box 156 \ 1 scan0120 | |
| Letter from The British Thermostat Co., Ltd. arranging a meeting with Mr. Steadman. | 30th Oct 1935 | Box 156 \ 1 scan0121 | |
| Letter from Ford Motor Company regarding thermostat operated bonnet side plate shutters on their Lincoln Car. | 30th Oct 1935 | Box 156 \ 1 scan0122 | |
| Letter to The Ford Motor Company Ltd. regarding a visit from their Lincoln representative. | 2nd Nov 1935 | Box 156 \ 1 scan0123 | |
| Letter to The British Thermostate Co. Ltd. arranging a meeting to discuss thermostatic problems. | 4th Nov 1935 | Box 156 \ 1 scan0124 | |
| Telegram received by telephone regarding an appointment. | 6th Nov 1936 | Box 156 \ 1 scan0125 | |
| Letter from The British Thermostat Co. regarding a drawing and calculations for a Bonnet Louvre Thermostat. | 12th Nov 1935 | Box 156 \ 1 scan0126 | |
| Letter to The British Thermostat Co. regarding incorrect calculations for a Bonnet Louvre Thermostat. | 19th Nov 1935 | Box 156 \ 1 scan0127 | |
| Letter discussing bellows load calculations, pointing out design inaccuracies, and requesting further information on radiator curves. | 19th Nov 1935 | Box 156 \ 1 scan0128 | |
| Revised calculations for bellows for use with a bonnet louvre scheme suggested by the British Thermostat Co. | 19th Nov 1935 | Box 156 \ 1 scan0129 | |
| Review of a book on thermostats published in the I.A.E. journal. | 21th Nov 1934 | Box 156 \ 1 scan0130 | |
| Review of the book 'Thermostats' by Roosevelt Griffiths, discussing temperature control technology. | 14th Feb 1934 | Box 156 \ 1 scan0131 | |
| Summary of a book on automobile coach painting, carburettor 'hot spotting', and thermostats. | 14th Feb 1934 | Box 156 \ 1 scan0132 | |
| Letter from The British Thermostat Co. Ltd. regarding a Bonnet Louvre Thermostat. | 22th Nov 1935 | Box 156 \ 1 scan0133 | |
| Letter from The British Thermostat Co. Ltd. to Mr. C. Steadman regarding the sending of charts. | 27th Nov 1935 | Box 156 \ 1 scan0134 | |
| Requesting the despatch of a Calorstat part on loan to The British Thermostat Co.Ltd. | 4th Dec 1935 | Box 156 \ 1 scan0135 | |
| Letter to The British Thermostat Co. Ltd. regarding the supply and testing of Calorstats. | 4th Dec 1935 | Box 156 \ 1 scan0136 | |
| Letter concerning corrections to calculations on a drawing for thermostat bellows. | 5th Dec 1935 | Box 156 \ 1 scan0137 | |
| Page 2 of a letter from The British Thermostat Co. Ltd. regarding the design of bellows for thermostats. | 5th Dec 1935 | Box 156 \ 1 scan0138 | |
| Design calculations and specifications for a Bonnet Thermostat. | 7th Dec 1935 | Box 156 \ 1 scan0139 | |
| Letter from The British Thermostat Co. Ltd. regarding an experimental Bonnet Louvre Thermostat. | 7th Dec 1935 | Box 156 \ 1 scan0140 | |
| Letter from The British Thermostat Co. Ltd. apologising for a delay in replying regarding the manufacture of Calorstats part no. E. 80893. | 9th Dec 1935 | Box 156 \ 1 scan0141 | |
| Quotation letter from The British Thermostat Co. Ltd. for Calorstats part number E. 80893. | 16th Dec 1935 | Box 156 \ 1 scan0142 | |
| Letter to The British Thermostat Co. Ltd. requesting a missing cooling chart that compares different matrix types. | 20th Dec 1935 | Box 156 \ 1 scan0143 | |
| Thermostatic water temperature control for cars with dummy shutters. | 20th Dec 1935 | Box 156 \ 1 scan0144 | |
| The return of a bonnet shutter operating thermostat borrowed from The British Thermostat Co. | 23th Dec 1935 | Box 156 \ 1 scan0145 | |
| Letter from F. W. Miller & Co. acknowledging a request for a further sample coil. | 31th Dec 1934 | Box 156 \ 1 scan0146 | |
| Tests conducted on thermostatically controlled bonnet shutters, comparing a Ph.III car with a Lincoln. | 1st Jan 1936 | Box 156 \ 1 scan0147 | |
| Conclusions and summary on the effectiveness of thermostatically controlled bonnet and radiator shutters. | 1st Jan 1936 | Box 156 \ 1 scan0148 | |
| To suspend work on thermostatically controlled bonnet louvres for the Phantom III following test results. | 6th Jan 1936 | Box 156 \ 1 scan0149 | |
| Letter to the British Thermostat Co. Ltd. regarding the design and testing of a bonnet louvre thermostat. | 7th Jan 1936 | Box 156 \ 1 scan0150 | |
| Letter discussing the price quote for an E.80893 Calorstat, comparing it to a competitor's price and requesting a reduction. | 7th Jan 1936 | Box 156 \ 1 scan0151 | |
| Letter from The British Thermostat Co., Ltd. regarding a delay in providing particulars for a proposed Shutter Thermostat. | 9th Nov 1935 | Box 156 \ 1 scan0152 | |
| Letter from a supplier discussing the benefits and combination of water thermostats and thermostatically controlled radiator shutters. | 8th Jan 1936 | Box 156 \ 1 scan0153 | |
| Instructing a change to the calorstat spring for various vehicle models. | 14th Jan 1936 | Box 156 \ 1 scan0154 | |
| Letter to The British Thermostat Co.Ltd. discussing a discrepancy in radiator core performance data and calculations. | 23th Jan 1936 | Box 156 \ 1 scan0155 | |
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