Faraday to Charles Babbage   21 February 1832

Royal Institution | Feb 21 1832

Dear Sir

The average quantity of Sulphate of Quinia from good yellow bark is about 40oz per 100lb¹.

Barks sometimes yield only about 30oz but the best yellow bark ought I understand to yield 40oz as above[.]

Ever truly yours | M. Faraday

I think I recollect something about Sulphate of quinine; that would be half English half French² | MF

Address: Charles Babbage Esq | &c &c &c