Faraday to George Herbert   17 September 1860

The Green | Hampton Court | 17 Septr. 1860.

My dear Sir

I could have sent you the accompanying report¹ on Friday² but have waited until now for the estimate of probable expence referred to at the end. I have not yet received it from Mr. Chance so send the report as it is thinking you may want it tomorrow³ & will send the sum when I know it[.]

The use of the North light in the experiments is to have a reference to the former state of the S light there I think it ought not to be altered. You will see by the report I now send that one of the Octants the 3rd is adjusted to the French focal point so that there will be a full comparison between it & the other arrangements with the lenticular zone both on & off.

Ever Truly Yours | M. Faraday

Geo Herbert Esq | &c &c &c