Faraday to Isambard Kingdom Brunel   18 June 1847¹

R Institution | 18 June 1847

My dear Brunel

Mine was merely an opinion without any practical knowledge²[.] If it be known that coal tar is per se destructive³ & there is no knowledge of the joint action of creosote & coal tar then the safest expectation to proceed upon is that it will to a certain amount interfere with the good effect of creosote. In like manner as to ammonia I know nothing practically but I should expect its rapid dissipation by solution & evaporation[.]

Ever Truly Yours | M. Faraday

I.K. Brunel Esq | &c & &c