Faraday to John Ayrton Paris¹   25 July 1820

Royal Institution, July 25, 1820.

Dear Sir, - I have again tried to dissolve some of Mr. Battley’s² extract in water, and, as before, find it partially soluble in that fluid. I cannot help thinking, either that Mr Battley has not tried the experiment with all his specimens of extract, or that he attached a meaning to the term solubility different to the general and accepted one. The appearances are so plain and distinct, that different views cannot be taken of them; and I should think Mr. Battley could as easily convince himself at home as here. Nevertheless, I am always ready to show him the experiment, or to see one made by him, either here or at his own house. It is an affair of not more than five minutes.

I am, dear Sir, | Yours very truly, | (signed) M. Faraday.