My Dear Sir
I have been engaged the last week in ascertaining carefully & accurately the temperature corresponding to a given pressure1[.] 90 atmospheres - when different portions of the liquid were evaporated and also after the liquid had been evaporated dried and rinsed several times. The last experiment I continued for 24 hours. In the first 3 hours the temperature required for this pressure, encreased from 84° to 90 but after this it did not vary more than 92° either when the whole quantity was reduced to liquid or nearly all evaporated.
I think I have got the liquid purer than before by allowing it to stand and distilling over once or twice before using[.] I am going today to try some which has been standing about 10 days. I shall then repeat the experiment upon the latent heat and let you know the result <-> on Thursday or Friday.
Believe me Dear Sir | Yours very truly | Mc Brunel
Tuesday Jany 15th 1833
Address: Ml Faraday Esq | Royal Institution | Albermarle St.
Please cite as “Faraday0639,” in Ɛpsilon: The Michael Faraday Collection accessed on 17 April 2024, https://epsilon.ac.uk/view/faraday/letters/Faraday0639