Faraday to Peter Henry Berthon   6 March 1861

Royal Institution | 6 March 1861

Sir

The five samples of white lead which you sent me1 have the following composition

diagram 2

The impurities of 1. 3. 5. are small in quantity & no doubt accidental. Those in 2 & 4 are larger in proportion though not equal to 1 per cent. But they consist chiefly of sulphate of baryta or heavy earth which I suppose has crept in from the mill3.

I am Sir | Your Very Obedient Servant | M. Faraday

P.H. Berthon Esqr | &c &c &c

2
Henry Grace. White lead supplier of Hollybush Gardens, Bethnal Green Road. POD.
3
This letter was read to Trinity House Wardens Committee, 12 March 1861, LMA CLC/526/MS 30025/29, p.6. Tudor’s tender was accepted.

Please cite as “Faraday3959,” in Ɛpsilon: The Michael Faraday Collection accessed on 8 May 2024, https://epsilon.ac.uk/view/faraday/letters/Faraday3959