To William Thomson   31 Aug 1850

Spring Bank 31^<t> Aug 1850.

Dear Professor,

I return you my sincere though tardy thanks for your long and valuable letter and the pamphlet which accompanied it.¹ I have waited this long hoping to be able to reply to you at some length. But a reply on such a subject if not elaborated by reflection is worse than none at all and this reflection it has not latterly been in my power to bestow upon it – I may return to Germany in a few weeks. If not I will certainly procure the proper apparatus for myself and shall feel truly happy to make whatever experiments you may require – with best wishes

believe me Dear Sir | very sincerely yours | John Tyndall

Prof. W. Thomson | Glasgow

Cambridge University, Kelvin Correspondence, Add.7342/T624