Faraday to William Somerville   10 April 1837

/R Institution | 10 April 1837

My dear Sir

Since you were here I have looked at the powder experimentally[.]

Boiling it leaves a fixed alkaline carbonate being Carbonate of Soda & a portion of Magnesia & the acid before burning is the Citric[.] The mixture is essentially Citric acid with Bicarb Soda & a little Magnesia probably as carbonate but this I did not pursue it dissolves however in the first action of water[.]

Ever Truly Yours | M. Faraday