From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Letter concerning the most satisfactory anti-freeze mixtures used in Canada.
| Identifier | ExFiles\Box 151\3\ scan0005 | |
| Date | 10th October 1914 | |
| COPY Toronto, Canada. October 10th. 1914. Claude Johnson Esq., Gen. Managing Director, Derby. Dear Sir:- Re Anti-freeze Mixture. In accordance with your request I have enquired into the above matter, and find that the most satisfactory anti-freeze mixture, and the one most commonly used in Canada, consists of a mixture of alcohol and glycerine with water. The strength of the mixture is, of course, governed according to the temperature conditions of the locality in which the car is to be used, and I enclose herewith a pamphlet which shows the proportion recommended by one American Company for temperature above 5 degrees and also above 10 degrees below zero. Last winter I tried the mixture of alcohol alone with water, and found it quite satisfactory, but there was considerable loss of alcohol on account of vaporization, making it necessary to add additional alcohol from time to time, and there was always some uncertainty as to whether the proper proportion was being maintained. It appears that by using glycerine in the mixture, the loss of alcohol by vaporization is much reduced. I understand the Russell Motor Co. have used | ||