Faraday to John Frederick William Herschel   8 April 1851

Royal Institution | 8 April 1851

My dear Sir John

I have no doubt you are aware of the lines on glass produced by M. Nobert. I have received from him some rulings & a paper which he wishes me to present to the Royal Society & I propose doing so by next Thursday1 but I thought you would like in the mean time to see an attempt to measure the length & velocity of the undulations of a ray of light by the direct application of a scale to them[.]

Ever Yours Truly | M. Faraday

Sir John F.W. Herschell Bart | &c &c &c

1
That is 10 April 1851. Faraday did this. See F.A. Nobert, “Description and purpose of the glass plate which bears the inscription ‘Interferenze-spectrum. Longitudo et celeritas undularum lucis relativa cum in aëre tum in vitro’”, Proc.Roy.Soc.,1851, 6: 43-5. The manuscript is in RS MS AP 33.21.

Please cite as “Faraday2406,” in Ɛpsilon: The Michael Faraday Collection accessed on 27 April 2024, https://epsilon.ac.uk/view/faraday/letters/Faraday2406